155031120 has 120 divisors (see below), whose sum is σ = 523767816. Its totient is φ = 41094144.

The previous prime is 155031119. The next prime is 155031137. The reversal of 155031120 is 21130551.

155031120 is a `hidden beast` number, since 1 + 550 + 3 + 112 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 106254864 + 48776256 = 10308^2 + 6984^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 155031093 and 155031102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141294 + ... + 142386.

Almost surely, 2^155031120 is an apocalyptic number.

155031120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155031120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261883908).

155031120 is an abundant number, since it is smaller than the sum of its proper divisors (368736696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155031120 is a wasteful number, since it uses less digits than its factorization.

155031120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 155031120 is about 12451.1493445384. The cubic root of 155031120 is about 537.2044829487.

Adding to 155031120 its reverse (21130551), we get a palindrome (176161671).

The spelling of 155031120 in words is "one hundred fifty-five million, thirty-one thousand, one hundred twenty".