157111997 has 8 divisors (see below), whose sum is σ = 180303552. Its totient is φ = 134107200.

The previous prime is 157111993. The next prime is 157112017. The reversal of 157111997 is 799111751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 157111997 - 2² = 157111993 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 (157111993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44879 + ... + 48252.

It is an arithmetic number, because the mean of its divisors is an integer number (22537944).

Almost surely, 2^157111997 is an apocalyptic number.

It is an amenable number.

157111997 is a deficient number, since it is larger than the sum of its proper divisors (23191555).

157111997 is an equidigital number, since it uses as much as digits as its factorization.

157111997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93379.

The product of its digits is 19845, while the sum is 41.

The square root of 157111997 is about 12534.4324562383. The cubic root of 157111997 is about 539.5973186770.

The spelling of 157111997 in words is "one hundred fifty-seven million, one hundred eleven thousand, nine hundred ninety-seven".