133156436 has 24 divisors (see below), whose sum is σ = 266864640. Its totient is φ = 56948832.

The previous prime is 133156433. The next prime is 133156447. The reversal of 133156436 is 634651331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133156433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9581 + ... + 18923.

It is an arithmetic number, because the mean of its divisors is an integer number (11119360).

Almost surely, 2^133156436 is an apocalyptic number.

It is an amenable number.

133156436 is an abundant number, since it is smaller than the sum of its proper divisors (133708204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133156436 is a wasteful number, since it uses less digits than its factorization.

133156436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9863 (or 9861 counting only the distinct ones).

The product of its digits is 19440, while the sum is 32.

The square root of 133156436 is about 11539.3429622314. The cubic root of 133156436 is about 510.6469247807.

The spelling of 133156436 in words is "one hundred thirty-three million, one hundred fifty-six thousand, four hundred thirty-six".