31248541 has 2 divisors, whose sum is σ = 31248542. Its totient is φ = 31248540.

The previous prime is 31248517. The next prime is 31248557. The reversal of 31248541 is 14584213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31248100 + 441 = 5590^2 + 21^2 .

It is a cyclic number.

It is not a de Polignac number, because 31248541 - 2⁵ = 31248509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31248571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15624270 + 15624271.

It is an arithmetic number, because the mean of its divisors is an integer number (15624271).

Almost surely, 2^31248541 is an apocalyptic number.

It is an amenable number.

31248541 is a deficient number, since it is larger than the sum of its proper divisors (1).

31248541 is an equidigital number, since it uses as much as digits as its factorization.

31248541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 28.

The square root of 31248541 is about 5590.0394452991. The cubic root of 31248541 is about 314.9753604646.

The spelling of 31248541 in words is "thirty-one million, two hundred forty-eight thousand, five hundred forty-one".