54987631 has 2 divisors, whose sum is σ = 54987632. Its totient is φ = 54987630.

The previous prime is 54987629. The next prime is 54987649. The reversal of 54987631 is 13678945.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54987631 - 2¹ = 54987629 is a prime.

It is a super-2 number, since 2×54987631² = 6047279125984322, which contains 22 as substring.

Together with 54987629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54987731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27493815 + 27493816.

It is an arithmetic number, because the mean of its divisors is an integer number (27493816).

Almost surely, 2^54987631 is an apocalyptic number.

54987631 is a deficient number, since it is larger than the sum of its proper divisors (1).

54987631 is an equidigital number, since it uses as much as digits as its factorization.

54987631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 54987631 is about 7415.3645223954. The cubic root of 54987631 is about 380.2667356242.

The spelling of 54987631 in words is "fifty-four million, nine hundred eighty-seven thousand, six hundred thirty-one".