164615431 has 2 divisors, whose sum is σ = 164615432. Its totient is φ = 164615430.

The previous prime is 164615419. The next prime is 164615441. The reversal of 164615431 is 134516461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164615431 is a prime.

It is a super-2 number, since 2×164615431² = 54196480246631522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164615393 and 164615402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164615441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82307715 + 82307716.

It is an arithmetic number, because the mean of its divisors is an integer number (82307716).

Almost surely, 2^164615431 is an apocalyptic number.

164615431 is a deficient number, since it is larger than the sum of its proper divisors (1).

164615431 is an equidigital number, since it uses as much as digits as its factorization.

164615431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 164615431 is about 12830.2545181302. The cubic root of 164615431 is about 548.0542052603.

The spelling of 164615431 in words is "one hundred sixty-four million, six hundred fifteen thousand, four hundred thirty-one".