157631887 has 8 divisors (see below), whose sum is σ = 182008736. Its totient is φ = 133719552.

The previous prime is 157631879. The next prime is 157631899. The reversal of 157631887 is 788136751.

157631887 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 157631887 - 2³ = 157631879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157631827) 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, 115398 + ... + 116755.

It is an arithmetic number, because the mean of its divisors is an integer number (22751092).

Almost surely, 2^157631887 is an apocalyptic number.

157631887 is a deficient number, since it is larger than the sum of its proper divisors (24376849).

157631887 is an equidigital number, since it uses as much as digits as its factorization.

157631887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232257.

The product of its digits is 282240, while the sum is 46.

The square root of 157631887 is about 12555.1538023236. The cubic root of 157631887 is about 540.1918465577.

The spelling of 157631887 in words is "one hundred fifty-seven million, six hundred thirty-one thousand, eight hundred eighty-seven".