31461641 has 2 divisors, whose sum is σ = 31461642. Its totient is φ = 31461640.

The previous prime is 31461571. The next prime is 31461653. The reversal of 31461641 is 14616413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31125241 + 336400 = 5579^2 + 580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31461641 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31461641.

It is not a weakly prime, because it can be changed into another prime (31461341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15730820 + 15730821.

It is an arithmetic number, because the mean of its divisors is an integer number (15730821).

Almost surely, 2^31461641 is an apocalyptic number.

It is an amenable number.

31461641 is a deficient number, since it is larger than the sum of its proper divisors (1).

31461641 is an equidigital number, since it uses as much as digits as its factorization.

31461641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 31461641 is about 5609.0677478526. The cubic root of 31461641 is about 315.6897324472.

The spelling of 31461641 in words is "thirty-one million, four hundred sixty-one thousand, six hundred forty-one".