31422641 has 2 divisors, whose sum is σ = 31422642. Its totient is φ = 31422640.

The previous prime is 31422593. The next prime is 31422659. The reversal of 31422641 is 14622413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16982641 + 14440000 = 4121^2 + 3800^2 .

It is a cyclic number.

It is not a de Polignac number, because 31422641 - 2¹⁰ = 31421617 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31422241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711320 + 15711321.

It is an arithmetic number, because the mean of its divisors is an integer number (15711321).

Almost surely, 2^31422641 is an apocalyptic number.

It is an amenable number.

31422641 is a deficient number, since it is larger than the sum of its proper divisors (1).

31422641 is an equidigital number, since it uses as much as digits as its factorization.

31422641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

The square root of 31422641 is about 5605.5901562637. The cubic root of 31422641 is about 315.5592350121.

The spelling of 31422641 in words is "thirty-one million, four hundred twenty-two thousand, six hundred forty-one".