54681631 has 2 divisors, whose sum is σ = 54681632. Its totient is φ = 54681630.

The previous prime is 54681629. The next prime is 54681647. The reversal of 54681631 is 13618645.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54681631 - 2¹ = 54681629 is a prime.

It is a super-2 number, since 2×54681631² = 5980161537640322, which contains 22 as substring.

Together with 54681629, 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 (54681611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27340815 + 27340816.

It is an arithmetic number, because the mean of its divisors is an integer number (27340816).

Almost surely, 2^54681631 is an apocalyptic number.

54681631 is a deficient number, since it is larger than the sum of its proper divisors (1).

54681631 is an equidigital number, since it uses as much as digits as its factorization.

54681631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

The square root of 54681631 is about 7394.7029014018. The cubic root of 54681631 is about 379.5600425296.

The spelling of 54681631 in words is "fifty-four million, six hundred eighty-one thousand, six hundred thirty-one".