157215867 has 4 divisors (see below), whose sum is σ = 209621160. Its totient is φ = 104810576.

The previous prime is 157215859. The next prime is 157215871. The reversal of 157215867 is 768512751.

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

It is a cyclic number.

It is not a de Polignac number, because 157215867 - 2³ = 157215859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157213867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26202642 + ... + 26202647.

It is an arithmetic number, because the mean of its divisors is an integer number (52405290).

Almost surely, 2^157215867 is an apocalyptic number.

157215867 is a deficient number, since it is larger than the sum of its proper divisors (52405293).

157215867 is an equidigital number, since it uses as much as digits as its factorization.

157215867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52405292.

The product of its digits is 117600, while the sum is 42.

The square root of 157215867 is about 12538.5751582865. The cubic root of 157215867 is about 539.7162054746.

The spelling of 157215867 in words is "one hundred fifty-seven million, two hundred fifteen thousand, eight hundred sixty-seven".