157864331 has 4 divisors (see below), whose sum is σ = 166173000. Its totient is φ = 149555664.

The previous prime is 157864303. The next prime is 157864339. The reversal of 157864331 is 133468751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157864331 is a prime.

It is a super-2 number, since 2×157864331² = 49842294004155122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157864339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4154306 + ... + 4154343.

It is an arithmetic number, because the mean of its divisors is an integer number (41543250).

Almost surely, 2^157864331 is an apocalyptic number.

157864331 is a deficient number, since it is larger than the sum of its proper divisors (8308669).

157864331 is an equidigital number, since it uses as much as digits as its factorization.

157864331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8308668.

The product of its digits is 60480, while the sum is 38.

The square root of 157864331 is about 12564.4073079473. The cubic root of 157864331 is about 540.4572384726.

The spelling of 157864331 in words is "one hundred fifty-seven million, eight hundred sixty-four thousand, three hundred thirty-one".