133556157 has 12 divisors (see below), whose sum is σ = 220473760. Its totient is φ = 76317768.

The previous prime is 133556141. The next prime is 133556191. The reversal of 133556157 is 751655331.

133556157 is a `hidden beast` number, since 1 + 3 + 35 + 5 + 615 + 7 = 666.

It is not a de Polignac number, because 133556157 - 2⁴ = 133556141 is a prime.

It is a super-3 number, since 3×133556157³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133558157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1059907 + ... + 1060032.

Almost surely, 2^133556157 is an apocalyptic number.

It is an amenable number.

133556157 is a deficient number, since it is larger than the sum of its proper divisors (86917603).

133556157 is a wasteful number, since it uses less digits than its factorization.

133556157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2119952 (or 2119949 counting only the distinct ones).

The product of its digits is 47250, while the sum is 36.

The square root of 133556157 is about 11556.6499038432. The cubic root of 133556157 is about 511.1573830071.

The spelling of 133556157 in words is "one hundred thirty-three million, five hundred fifty-six thousand, one hundred fifty-seven".