155164431 has 16 divisors (see below), whose sum is σ = 218499840. Its totient is φ = 97672320.

The previous prime is 155164403. The next prime is 155164441. The reversal of 155164431 is 134461551.

It is a happy number.

It is not a de Polignac number, because 155164431 - 2⁹ = 155163919 is a prime.

It is a super-2 number, since 2×155164431² = 48152001295107522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155164441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13351 + ... + 22103.

It is an arithmetic number, because the mean of its divisors is an integer number (13656240).

Almost surely, 2^155164431 is an apocalyptic number.

155164431 is a deficient number, since it is larger than the sum of its proper divisors (63335409).

155164431 is a wasteful number, since it uses less digits than its factorization.

155164431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9086.

The product of its digits is 7200, while the sum is 30.

The square root of 155164431 is about 12456.5015554127. The cubic root of 155164431 is about 537.3584192451.

The spelling of 155164431 in words is "one hundred fifty-five million, one hundred sixty-four thousand, four hundred thirty-one".