31214641 has 2 divisors, whose sum is σ = 31214642. Its totient is φ = 31214640.

The previous prime is 31214639. The next prime is 31214683. The reversal of 31214641 is 14641213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15840400 + 15374241 = 3980^2 + 3921^2 .

It is an emirp because it is prime and its reverse (14641213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31214641 - 2¹ = 31214639 is a prime.

Together with 31214639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31214041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15607320 + 15607321.

It is an arithmetic number, because the mean of its divisors is an integer number (15607321).

Almost surely, 2^31214641 is an apocalyptic number.

It is an amenable number.

31214641 is a deficient number, since it is larger than the sum of its proper divisors (1).

31214641 is an equidigital number, since it uses as much as digits as its factorization.

31214641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

The square root of 31214641 is about 5587.0064435259. The cubic root of 31214641 is about 314.8614188433.

Adding to 31214641 its reverse (14641213), we get a palindrome (45855854).

The spelling of 31214641 in words is "thirty-one million, two hundred fourteen thousand, six hundred forty-one".