7213567631 has 2 divisors, whose sum is σ = 7213567632. Its totient is φ = 7213567630.

The previous prime is 7213567609. The next prime is 7213567633. The reversal of 7213567631 is 1367653127.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1367653127) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7213567631 is a prime.

It is a super-2 number, since 2×7213567631² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 7213567633, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7213567633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3606783815 + 3606783816.

It is an arithmetic number, because the mean of its divisors is an integer number (3606783816).

Almost surely, 2^7213567631 is an apocalyptic number.

7213567631 is a deficient number, since it is larger than the sum of its proper divisors (1).

7213567631 is an equidigital number, since it uses as much as digits as its factorization.

7213567631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 41.

The square root of 7213567631 is about 84932.7241468211. The cubic root of 7213567631 is about 1932.1909158932.

The spelling of 7213567631 in words is "seven billion, two hundred thirteen million, five hundred sixty-seven thousand, six hundred thirty-one".