136531857 has 32 divisors (see below), whose sum is σ = 228003840. Its totient is φ = 70600320.

The previous prime is 136531849. The next prime is 136531877. The reversal of 136531857 is 758135631.

It is a happy number.

It is not a de Polignac number, because 136531857 - 2³ = 136531849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136531817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53973 + ... + 56445.

It is an arithmetic number, because the mean of its divisors is an integer number (7125120).

Almost surely, 2^136531857 is an apocalyptic number.

It is an amenable number.

136531857 is a deficient number, since it is larger than the sum of its proper divisors (91471983).

136531857 is a wasteful number, since it uses less digits than its factorization.

136531857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2733.

The product of its digits is 75600, while the sum is 39.

The square root of 136531857 is about 11684.6847197517. The cubic root of 136531857 is about 514.9258158140.

The spelling of 136531857 in words is "one hundred thirty-six million, five hundred thirty-one thousand, eight hundred fifty-seven".