157611317 has 4 divisors (see below), whose sum is σ = 163046220. Its totient is φ = 152176416.

The previous prime is 157611313. The next prime is 157611397. The reversal of 157611317 is 713116751.

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 109641841 + 47969476 = 10471^2 + 6926^2 .

It is a cyclic number.

It is not a de Polignac number, because 157611317 - 2² = 157611313 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 (157611313) 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, 2717408 + ... + 2717465.

It is an arithmetic number, because the mean of its divisors is an integer number (40761555).

Almost surely, 2^157611317 is an apocalyptic number.

It is an amenable number.

157611317 is a deficient number, since it is larger than the sum of its proper divisors (5434903).

157611317 is an equidigital number, since it uses as much as digits as its factorization.

157611317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5434902.

The product of its digits is 4410, while the sum is 32.

The square root of 157611317 is about 12554.3345900928. The cubic root of 157611317 is about 540.1683482883.

The spelling of 157611317 in words is "one hundred fifty-seven million, six hundred eleven thousand, three hundred seventeen".