157494213 has 10 divisors (see below), whose sum is σ = 235269254. Its totient is φ = 104996088.

The previous prime is 157494203. The next prime is 157494221. The reversal of 157494213 is 312494751.

157494213 is a `hidden beast` number, since 157 + 494 + 2 + 13 = 666.

157494213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 154927809 + 2566404 = 12447^2 + 1602^2 .

It is not a de Polignac number, because 157494213 - 2⁸ = 157493957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157494203) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 972106 + ... + 972267.

Almost surely, 2^157494213 is an apocalyptic number.

It is an amenable number.

157494213 is a deficient number, since it is larger than the sum of its proper divisors (77775041).

157494213 is an equidigital number, since it uses as much as digits as its factorization.

157494213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944385 (or 1944376 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 157494213 is about 12549.6698362945. The cubic root of 157494213 is about 540.0345348284.

The spelling of 157494213 in words is "one hundred fifty-seven million, four hundred ninety-four thousand, two hundred thirteen".