157415213 has 2 divisors, whose sum is σ = 157415214. Its totient is φ = 157415212.

The previous prime is 157415149. The next prime is 157415249. The reversal of 157415213 is 312514751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150136009 + 7279204 = 12253^2 + 2698^2 .

It is a cyclic number.

It is not a de Polignac number, because 157415213 - 2⁶ = 157415149 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157415263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78707606 + 78707607.

It is an arithmetic number, because the mean of its divisors is an integer number (78707607).

Almost surely, 2^157415213 is an apocalyptic number.

It is an amenable number.

157415213 is a deficient number, since it is larger than the sum of its proper divisors (1).

157415213 is an equidigital number, since it uses as much as digits as its factorization.

157415213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 29.

The square root of 157415213 is about 12546.5219483329. The cubic root of 157415213 is about 539.9442249206.

Adding to 157415213 its reverse (312514751), we get a palindrome (469929964).

The spelling of 157415213 in words is "one hundred fifty-seven million, four hundred fifteen thousand, two hundred thirteen".