31211130541 has 2 divisors, whose sum is σ = 31211130542. Its totient is φ = 31211130540.

The previous prime is 31211130493. The next prime is 31211130547. The reversal of 31211130541 is 14503111213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19640901316 + 11570229225 = 140146^2 + 107565^2 .

It is a cyclic number.

It is not a de Polignac number, because 31211130541 - 2²⁷ = 31076912813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31211130547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15605565270 + 15605565271.

It is an arithmetic number, because the mean of its divisors is an integer number (15605565271).

Almost surely, 2^31211130541 is an apocalyptic number.

It is an amenable number.

31211130541 is a deficient number, since it is larger than the sum of its proper divisors (1).

31211130541 is an equidigital number, since it uses as much as digits as its factorization.

31211130541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 31211130541 its reverse (14503111213), we get a palindrome (45714241754).

The spelling of 31211130541 in words is "thirty-one billion, two hundred eleven million, one hundred thirty thousand, five hundred forty-one".