164274431 has 4 divisors (see below), whose sum is σ = 164311392. Its totient is φ = 164237472.

The previous prime is 164274427. The next prime is 164274433. The reversal of 164274431 is 134472461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164274431 - 2² = 164274427 is a prime.

It is a super-2 number, since 2×164274431² = 53972177360747522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164274433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10730 + ... + 21063.

It is an arithmetic number, because the mean of its divisors is an integer number (41077848).

Almost surely, 2^164274431 is an apocalyptic number.

164274431 is a deficient number, since it is larger than the sum of its proper divisors (36961).

164274431 is an equidigital number, since it uses as much as digits as its factorization.

164274431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36960.

The product of its digits is 16128, while the sum is 32.

The square root of 164274431 is about 12816.9587266247. The cubic root of 164274431 is about 547.6755131851.

The spelling of 164274431 in words is "one hundred sixty-four million, two hundred seventy-four thousand, four hundred thirty-one".