54691631 has 8 divisors (see below), whose sum is σ = 57922944. Its totient is φ = 51531480.

The previous prime is 54691619. The next prime is 54691649. The reversal of 54691631 is 13619645.

54691631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54691631 is a prime.

It is a super-2 number, since 2×54691631² = 5982349002880322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54691591 and 54691600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54691531) 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 7 ways as a sum of consecutive naturals, for example, 16205 + ... + 19286.

It is an arithmetic number, because the mean of its divisors is an integer number (7240368).

Almost surely, 2^54691631 is an apocalyptic number.

54691631 is a deficient number, since it is larger than the sum of its proper divisors (3231313).

54691631 is a wasteful number, since it uses less digits than its factorization.

54691631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35581.

The product of its digits is 19440, while the sum is 35.

The square root of 54691631 is about 7395.3790301782. The cubic root of 54691631 is about 379.5831786907.

The spelling of 54691631 in words is "fifty-four million, six hundred ninety-one thousand, six hundred thirty-one".