157631091 has 16 divisors (see below), whose sum is σ = 215322624. Its totient is φ = 102527744.

The previous prime is 157631083. The next prime is 157631099. The reversal of 157631091 is 190136751.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (157631083) and next prime (157631099).

It is a cyclic number.

It is not a de Polignac number, because 157631091 - 2³ = 157631083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157631099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48190 + ... + 51356.

It is an arithmetic number, because the mean of its divisors is an integer number (13457664).

Almost surely, 2^157631091 is an apocalyptic number.

157631091 is a deficient number, since it is larger than the sum of its proper divisors (57691533).

157631091 is a wasteful number, since it uses less digits than its factorization.

157631091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570.

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 157631091 is about 12555.1221021542. The cubic root of 157631091 is about 540.1909372801.

The spelling of 157631091 in words is "one hundred fifty-seven million, six hundred thirty-one thousand, ninety-one".