55533631 has 2 divisors, whose sum is σ = 55533632. Its totient is φ = 55533630.

The previous prime is 55533601. The next prime is 55533659. The reversal of 55533631 is 13633555.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55533631 - 2¹¹ = 55531583 is a prime.

It is a super-2 number, since 2×55533631² = 6167968344088322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55533593 and 55533602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55533601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27766815 + 27766816.

It is an arithmetic number, because the mean of its divisors is an integer number (27766816).

Almost surely, 2^55533631 is an apocalyptic number.

55533631 is a deficient number, since it is larger than the sum of its proper divisors (1).

55533631 is an equidigital number, since it uses as much as digits as its factorization.

55533631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20250, while the sum is 31.

The square root of 55533631 is about 7452.0890359684. The cubic root of 55533631 is about 381.5212128780.

The spelling of 55533631 in words is "fifty-five million, five hundred thirty-three thousand, six hundred thirty-one".