157542813 has 20 divisors (see below), whose sum is σ = 247730560. Its totient is φ = 99499752.

The previous prime is 157542793. The next prime is 157542817. The reversal of 157542813 is 318245751.

157542813 is a `hidden beast` number, since 1 + 575 + 4 + 2 + 81 + 3 = 666.

It is not a de Polignac number, because 157542813 - 2⁸ = 157542557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157542817) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49645 + ... + 52722.

It is an arithmetic number, because the mean of its divisors is an integer number (12386528).

Almost surely, 2^157542813 is an apocalyptic number.

It is an amenable number.

157542813 is a deficient number, since it is larger than the sum of its proper divisors (90187747).

157542813 is a wasteful number, since it uses less digits than its factorization.

157542813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102398 (or 102389 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 157542813 is about 12551.6059928600. The cubic root of 157542813 is about 540.0900775659.

The spelling of 157542813 in words is "one hundred fifty-seven million, five hundred forty-two thousand, eight hundred thirteen".