157215871 has 2 divisors, whose sum is σ = 157215872. Its totient is φ = 157215870.

The previous prime is 157215859. The next prime is 157215913. The reversal of 157215871 is 178512751.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157215871 - 2⁷ = 157215743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157215871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157210871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78607935 + 78607936.

It is an arithmetic number, because the mean of its divisors is an integer number (78607936).

Almost surely, 2^157215871 is an apocalyptic number.

157215871 is a deficient number, since it is larger than the sum of its proper divisors (1).

157215871 is an equidigital number, since it uses as much as digits as its factorization.

157215871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19600, while the sum is 37.

The square root of 157215871 is about 12538.5753177943. The cubic root of 157215871 is about 539.7162100518.

The spelling of 157215871 in words is "one hundred fifty-seven million, two hundred fifteen thousand, eight hundred seventy-one".