164115731 has 6 divisors (see below), whose sum is σ = 177711300. Its totient is φ = 151491288.

The previous prime is 164115713. The next prime is 164115737. The reversal of 164115731 is 137511461.

It is a happy number.

It is not a de Polignac number, because 164115731 - 2⁶ = 164115667 is a prime.

It is a super-2 number, since 2×164115731² = 53867946323328722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164115694 and 164115703.

It is not an unprimeable number, because it can be changed into a prime (164115737) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 485381 + ... + 485718.

It is an arithmetic number, because the mean of its divisors is an integer number (29618550).

Almost surely, 2^164115731 is an apocalyptic number.

164115731 is a deficient number, since it is larger than the sum of its proper divisors (13595569).

164115731 is an equidigital number, since it uses as much as digits as its factorization.

164115731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971125 (or 971112 counting only the distinct ones).

The product of its digits is 2520, while the sum is 29.

The square root of 164115731 is about 12810.7662143995. The cubic root of 164115731 is about 547.4990927336.

The spelling of 164115731 in words is "one hundred sixty-four million, one hundred fifteen thousand, seven hundred thirty-one".