157057213 has 2 divisors, whose sum is σ = 157057214. Its totient is φ = 157057212.

The previous prime is 157057207. The next prime is 157057247. The reversal of 157057213 is 312750751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156675289 + 381924 = 12517^2 + 618^2 .

It is a cyclic number.

It is not a de Polignac number, because 157057213 - 2⁹ = 157056701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157057513) 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 as a sum of consecutive naturals, namely, 78528606 + 78528607.

It is an arithmetic number, because the mean of its divisors is an integer number (78528607).

Almost surely, 2^157057213 is an apocalyptic number.

It is an amenable number.

157057213 is a deficient number, since it is larger than the sum of its proper divisors (1).

157057213 is an equidigital number, since it uses as much as digits as its factorization.

157057213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 157057213 is about 12532.2469254320. The cubic root of 157057213 is about 539.5345932822.

The spelling of 157057213 in words is "one hundred fifty-seven million, fifty-seven thousand, two hundred thirteen".