157845631 has 4 divisors (see below), whose sum is σ = 157873032. Its totient is φ = 157818232.

The previous prime is 157845581. The next prime is 157845643. The reversal of 157845631 is 136548751.

It is a happy number.

157845631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157845631 - 2⁷ = 157845503 is a prime.

It is a super-2 number, since 2×157845631² = 49830486451576322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157845691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1345 + ... + 17818.

It is an arithmetic number, because the mean of its divisors is an integer number (39468258).

Almost surely, 2^157845631 is an apocalyptic number.

157845631 is a deficient number, since it is larger than the sum of its proper divisors (27401).

157845631 is an equidigital number, since it uses as much as digits as its factorization.

157845631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27400.

The product of its digits is 100800, while the sum is 40.

The square root of 157845631 is about 12563.6631202846. The cubic root of 157845631 is about 540.4358974697.

The spelling of 157845631 in words is "one hundred fifty-seven million, eight hundred forty-five thousand, six hundred thirty-one".