157131399 has 8 divisors (see below), whose sum is σ = 209567232. Its totient is φ = 104724920.

The previous prime is 157131383. The next prime is 157131407. The reversal of 157131399 is 993131751.

157131399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 157131399 - 2⁴ = 157131383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157131329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14122 + ... + 22664.

It is an arithmetic number, because the mean of its divisors is an integer number (26195904).

Almost surely, 2^157131399 is an apocalyptic number.

157131399 is a deficient number, since it is larger than the sum of its proper divisors (52435833).

157131399 is an equidigital number, since it uses as much as digits as its factorization.

157131399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14677.

The product of its digits is 25515, while the sum is 39.

The square root of 157131399 is about 12535.2063804311. The cubic root of 157131399 is about 539.6195296612.

The spelling of 157131399 in words is "one hundred fifty-seven million, one hundred thirty-one thousand, three hundred ninety-nine".