53216631 has 12 divisors (see below), whose sum is σ = 82781608. Its totient is φ = 32748624.

The previous prime is 53216627. The next prime is 53216633. The reversal of 53216631 is 13661235.

53216631 is a `hidden beast` number, since 5 + 3 + 21 + 6 + 631 = 666.

53216631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53216631 - 2² = 53216627 is a prime.

It is a super-2 number, since 2×53216631² = 5664019629980322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 53216595 and 53216604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53216633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227305 + ... + 227538.

Almost surely, 2^53216631 is an apocalyptic number.

53216631 is a deficient number, since it is larger than the sum of its proper divisors (29564977).

53216631 is a wasteful number, since it uses less digits than its factorization.

53216631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454862 (or 454859 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 53216631 is about 7294.9729951522. The cubic root of 53216631 is about 376.1396583019.

Adding to 53216631 its reverse (13661235), we get a palindrome (66877866).

The spelling of 53216631 in words is "fifty-three million, two hundred sixteen thousand, six hundred thirty-one".