131012231 has 12 divisors (see below), whose sum is σ = 157320000. Its totient is φ = 108672480.

The previous prime is 131012213. The next prime is 131012249. The reversal of 131012231 is 132210131.

It is an interprime number because it is at equal distance from previous prime (131012213) and next prime (131012249).

It is not a de Polignac number, because 131012231 - 2¹⁴ = 130995847 is a prime.

It is a super-2 number, since 2×131012231² = 34328409343194722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131012831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41606 + ... + 44643.

It is an arithmetic number, because the mean of its divisors is an integer number (13110000).

Almost surely, 2^131012231 is an apocalyptic number.

131012231 is a deficient number, since it is larger than the sum of its proper divisors (26307769).

131012231 is an equidigital number, since it uses as much as digits as its factorization.

131012231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86294 (or 86287 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 131012231 is about 11446.0574435043. The cubic root of 131012231 is about 507.8911134865.

Adding to 131012231 its reverse (132210131), we get a palindrome (263222362).

The spelling of 131012231 in words is "one hundred thirty-one million, twelve thousand, two hundred thirty-one".