7216091631 has 40 divisors (see below), whose sum is σ = 12363342464. Its totient is φ = 4108818960.

The previous prime is 7216091587. The next prime is 7216091647. The reversal of 7216091631 is 1361906127.

7216091631 is a `hidden beast` number, since 7 + 2 + 1 + 609 + 16 + 31 = 666.

It is not a de Polignac number, because 7216091631 - 2¹³ = 7216083439 is a prime.

It is a super-2 number, since 2×7216091631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7216091651) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 137976 + ... + 182946.

Almost surely, 2^7216091631 is an apocalyptic number.

7216091631 is a deficient number, since it is larger than the sum of its proper divisors (5147250833).

7216091631 is a wasteful number, since it uses less digits than its factorization.

7216091631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45273 (or 45264 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 7216091631 is about 84947.5816665784. The cubic root of 7216091631 is about 1932.4162450431.

Adding to 7216091631 its reverse (1361906127), we get a palindrome (8577997758).

The spelling of 7216091631 in words is "seven billion, two hundred sixteen million, ninety-one thousand, six hundred thirty-one".