157031 has 4 divisors (see below), whose sum is σ = 179472. Its totient is φ = 134592.

The previous prime is 157019. The next prime is 157037. The reversal of 157031 is 130751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130751 = 53 ⋅2467.

It is a cyclic number.

It is not a de Polignac number, because 157031 - 2⁶ = 156967 is a prime.

It is a super-2 number, since 2×157031² = 49317469922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 157031.

It is not an unprimeable number, because it can be changed into a prime (157037) 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, 11210 + ... + 11223.

It is an arithmetic number, because the mean of its divisors is an integer number (44868).

2¹⁵⁷⁰³¹ is an apocalyptic number.

157031 is a deficient number, since it is larger than the sum of its proper divisors (22441).

157031 is an equidigital number, since it uses as much as digits as its factorization.

157031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22440.

The product of its (nonzero) digits is 105, while the sum is 17.

The square root of 157031 is about 396.2713716634. The cubic root of 157031 is about 53.9504575331.

Adding to 157031 its reverse (130751), we get a palindrome (287782).

The spelling of 157031 in words is "one hundred fifty-seven thousand, thirty-one".