133164531 has 6 divisors (see below), whose sum is σ = 192348780. Its totient is φ = 88776348.

The previous prime is 133164529. The next prime is 133164541. The reversal of 133164531 is 135461331.

133164531 is a `hidden beast` number, since 13 + 3 + 1 + 645 + 3 + 1 = 666.

It is not a de Polignac number, because 133164531 - 2¹ = 133164529 is a prime.

It is a super-2 number, since 2×133164531² = 35465584632899922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133164495 and 133164504.

It is not an unprimeable number, because it can be changed into a prime (133164541) 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, 7398021 + ... + 7398038.

It is an arithmetic number, because the mean of its divisors is an integer number (32058130).

Almost surely, 2^133164531 is an apocalyptic number.

133164531 is a deficient number, since it is larger than the sum of its proper divisors (59184249).

133164531 is a wasteful number, since it uses less digits than its factorization.

133164531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14796065 (or 14796062 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 133164531 is about 11539.6937134397. The cubic root of 133164531 is about 510.6572725171.

The spelling of 133164531 in words is "one hundred thirty-three million, one hundred sixty-four thousand, five hundred thirty-one".