155263120 has 80 divisors (see below), whose sum is σ = 371851200. Its totient is φ = 60268032.

The previous prime is 155263111. The next prime is 155263123. The reversal of 155263120 is 21362551.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (155263123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444706 + ... + 445054.

It is an arithmetic number, because the mean of its divisors is an integer number (4648140).

Almost surely, 2^155263120 is an apocalyptic number.

155263120 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 155263120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185925600).

155263120 is an abundant number, since it is smaller than the sum of its proper divisors (216588080).

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

155263120 is a wasteful number, since it uses less digits than its factorization.

155263120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 155263120 is about 12460.4622707185. The cubic root of 155263120 is about 537.4723201899.

The spelling of 155263120 in words is "one hundred fifty-five million, two hundred sixty-three thousand, one hundred twenty".