157409631 has 12 divisors (see below), whose sum is σ = 237255408. Its totient is φ = 100377024.

The previous prime is 157409621. The next prime is 157409671. The reversal of 157409631 is 136904751.

157409631 is a `hidden beast` number, since 15 + 7 + 4 + 0 + 9 + 631 = 666.

It is not a de Polignac number, because 157409631 - 2⁷ = 157409503 is a prime.

It is a super-2 number, since 2×157409631² = 49555583863112322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157409621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 380010 + ... + 380423.

It is an arithmetic number, because the mean of its divisors is an integer number (19771284).

Almost surely, 2^157409631 is an apocalyptic number.

157409631 is a deficient number, since it is larger than the sum of its proper divisors (79845777).

157409631 is a wasteful number, since it uses less digits than its factorization.

157409631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760462 (or 760459 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 157409631 is about 12546.2994942732. The cubic root of 157409631 is about 539.9378426398.

The spelling of 157409631 in words is "one hundred fifty-seven million, four hundred nine thousand, six hundred thirty-one".