53631631 has 2 divisors, whose sum is σ = 53631632. Its totient is φ = 53631630.

The previous prime is 53631619. The next prime is 53631647. The reversal of 53631631 is 13613635.

53631631 = T₅₉₇₈ + T₅₉₇₉ + T₅₉₈₀.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53631631 - 2⁹ = 53631119 is a prime.

It is a super-2 number, since 2×53631631² = 5752703687440322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53631631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53631131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26815815 + 26815816.

It is an arithmetic number, because the mean of its divisors is an integer number (26815816).

Almost surely, 2^53631631 is an apocalyptic number.

53631631 is the 5980-th centered triangular number.

53631631 is a deficient number, since it is larger than the sum of its proper divisors (1).

53631631 is an equidigital number, since it uses as much as digits as its factorization.

53631631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 28.

The square root of 53631631 is about 7323.3620011577. The cubic root of 53631631 is about 377.1148793757.

The spelling of 53631631 in words is "fifty-three million, six hundred thirty-one thousand, six hundred thirty-one".