155131120 has 40 divisors (see below), whose sum is σ = 381899664. Its totient is φ = 58401792.

The previous prime is 155131087. The next prime is 155131127. The reversal of 155131120 is 21131551.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155131127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55674 + ... + 58393.

Almost surely, 2^155131120 is an apocalyptic number.

155131120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155131120 is an abundant number, since it is smaller than the sum of its proper divisors (226768544).

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

155131120 is a wasteful number, since it uses less digits than its factorization.

155131120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114097 (or 114091 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 155131120 is about 12455.1643907256. The cubic root of 155131120 is about 537.3199627783.

Adding to 155131120 its reverse (21131551), we get a palindrome (176262671).

The spelling of 155131120 in words is "one hundred fifty-five million, one hundred thirty-one thousand, one hundred twenty".