53216236631 has 4 divisors (see below), whose sum is σ = 54514193664. Its totient is φ = 51918279600.

The previous prime is 53216236613. The next prime is 53216236643. The reversal of 53216236631 is 13663261235.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53216236631 - 2²² = 53212042327 is a prime.

It is a super-2 number, since 2×53216236631² (a number of 22 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 (53216236231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648978455 + ... + 648978536.

It is an arithmetic number, because the mean of its divisors is an integer number (13628548416).

Almost surely, 2^53216236631 is an apocalyptic number.

53216236631 is a deficient number, since it is larger than the sum of its proper divisors (1297957033).

53216236631 is a wasteful number, since it uses less digits than its factorization.

53216236631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297957032.

The product of its digits is 116640, while the sum is 38.

Adding to 53216236631 its reverse (13663261235), we get a palindrome (66879497866).

The spelling of 53216236631 in words is "fifty-three billion, two hundred sixteen million, two hundred thirty-six thousand, six hundred thirty-one".