231210131 has 2 divisors, whose sum is σ = 231210132. Its totient is φ = 231210130.

The previous prime is 231210103. The next prime is 231210137. The reversal of 231210131 is 131012132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231210131 - 2²² = 227015827 is a prime.

It is a super-2 number, since 2×231210131² = 106916249354074322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231210137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115605065 + 115605066.

It is an arithmetic number, because the mean of its divisors is an integer number (115605066).

Almost surely, 2^231210131 is an apocalyptic number.

231210131 is a deficient number, since it is larger than the sum of its proper divisors (1).

231210131 is an equidigital number, since it uses as much as digits as its factorization.

231210131 is an evil number, because the sum of its binary digits is even.

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

The square root of 231210131 is about 15205.5953845944. The cubic root of 231210131 is about 613.7652366721.

Adding to 231210131 its reverse (131012132), we get a palindrome (362222263).

It can be divided in two parts, 2312101 and 31, that added together give a palindrome (2312132).

The spelling of 231210131 in words is "two hundred thirty-one million, two hundred ten thousand, one hundred thirty-one".