157313249 has 4 divisors (see below), whose sum is σ = 158552064. Its totient is φ = 156074436.

The previous prime is 157313237. The next prime is 157313323. The reversal of 157313249 is 942313751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157313249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157313549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619217 + ... + 619470.

It is an arithmetic number, because the mean of its divisors is an integer number (39638016).

Almost surely, 2^157313249 is an apocalyptic number.

It is an amenable number.

157313249 is a deficient number, since it is larger than the sum of its proper divisors (1238815).

157313249 is a wasteful number, since it uses less digits than its factorization.

157313249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238814.

The product of its digits is 22680, while the sum is 35.

The square root of 157313249 is about 12542.4578532280. The cubic root of 157313249 is about 539.8276187315.

The spelling of 157313249 in words is "one hundred fifty-seven million, three hundred thirteen thousand, two hundred forty-nine".