155811032 has 32 divisors (see below), whose sum is σ = 315134400. Its totient is φ = 71794944.

The previous prime is 155811013. The next prime is 155811037. The reversal of 155811032 is 230118551.

It is a happy number.

155811032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 155810992 and 155811010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155811037) 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, 116753 + ... + 118079.

It is an arithmetic number, because the mean of its divisors is an integer number (9847950).

Almost surely, 2^155811032 is an apocalyptic number.

It is an amenable number.

155811032 is an abundant number, since it is smaller than the sum of its proper divisors (159323368).

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

155811032 is a wasteful number, since it uses less digits than its factorization.

155811032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2475 (or 2471 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 155811032 is about 12482.4289303004. The cubic root of 155811032 is about 538.1038112210.

Adding to 155811032 its reverse (230118551), we get a palindrome (385929583).

The spelling of 155811032 in words is "one hundred fifty-five million, eight hundred eleven thousand, thirty-two".