164515531 has 2 divisors, whose sum is σ = 164515532. Its totient is φ = 164515530.

The previous prime is 164515529. The next prime is 164515537. The reversal of 164515531 is 135515461.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164515531 - 2¹ = 164515529 is a prime.

It is a super-2 number, since 2×164515531² = 54130719880423922, which contains 22 as substring.

Together with 164515529, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 164515493 and 164515502.

It is not a weakly prime, because it can be changed into another prime (164515537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82257765 + 82257766.

It is an arithmetic number, because the mean of its divisors is an integer number (82257766).

Almost surely, 2^164515531 is an apocalyptic number.

164515531 is a deficient number, since it is larger than the sum of its proper divisors (1).

164515531 is an equidigital number, since it uses as much as digits as its factorization.

164515531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 31.

The square root of 164515531 is about 12826.3607855073. The cubic root of 164515531 is about 547.9433171254.

The spelling of 164515531 in words is "one hundred sixty-four million, five hundred fifteen thousand, five hundred thirty-one".