531156 has 12 divisors (see below), whose sum is σ = 1239392. Its totient is φ = 177048.

The previous prime is 531143. The next prime is 531163. The reversal of 531156 is 651135.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nialpdrome in base 9.

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 531156.

It is an unprimeable number.

531156 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22120 + ... + 22143.

2⁵³¹¹⁵⁶ is an apocalyptic number.

It is an amenable number.

531156 is an abundant number, since it is smaller than the sum of its proper divisors (708236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531156 is a wasteful number, since it uses less digits than its factorization.

531156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44270 (or 44268 counting only the distinct ones).

The product of its digits is 450, while the sum is 21.

The square root of 531156 is about 728.8045005350. The cubic root of 531156 is about 80.9855179108.

Subtracting from 531156 its sum of digits (21), we obtain a palindrome (531135).

The spelling of 531156 in words is "five hundred thirty-one thousand, one hundred fifty-six".