155230172 has 12 divisors (see below), whose sum is σ = 277970616. Its totient is φ = 75810000.

The previous prime is 155230147. The next prime is 155230189. The reversal of 155230172 is 271032551.

155230172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451079 + ... + 451422.

It is an arithmetic number, because the mean of its divisors is an integer number (23164218).

Almost surely, 2^155230172 is an apocalyptic number.

It is an amenable number.

155230172 is a deficient number, since it is larger than the sum of its proper divisors (122740444).

155230172 is a wasteful number, since it uses less digits than its factorization.

155230172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902548 (or 902546 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 155230172 is about 12459.1400987388. The cubic root of 155230172 is about 537.4342989461.

The spelling of 155230172 in words is "one hundred fifty-five million, two hundred thirty thousand, one hundred seventy-two".