157237613 has 4 divisors (see below), whose sum is σ = 169332828. Its totient is φ = 145142400.

The previous prime is 157237609. The next prime is 157237631. The reversal of 157237613 is 316732751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17123044 + 140114569 = 4138^2 + 11837^2 .

It is not a de Polignac number, because 157237613 - 2² = 157237609 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 (157234613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6047588 + ... + 6047613.

It is an arithmetic number, because the mean of its divisors is an integer number (42333207).

Almost surely, 2^157237613 is an apocalyptic number.

157237613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

157237613 is a deficient number, since it is larger than the sum of its proper divisors (12095215).

157237613 is a wasteful number, since it uses less digits than its factorization.

157237613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12095214.

The product of its digits is 26460, while the sum is 35.

The square root of 157237613 is about 12539.4422922234. The cubic root of 157237613 is about 539.7410887295.

The spelling of 157237613 in words is "one hundred fifty-seven million, two hundred thirty-seven thousand, six hundred thirteen".