54721631 has 4 divisors (see below), whose sum is σ = 56200632. Its totient is φ = 53242632.

The previous prime is 54721613. The next prime is 54721649. The reversal of 54721631 is 13612745.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (54721613) and next prime (54721649).

It is a cyclic number.

It is not a de Polignac number, because 54721631 - 2¹⁰ = 54720607 is a prime.

It is a super-2 number, since 2×54721631² = 5988913798600322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 54721594 and 54721603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54721661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739445 + ... + 739518.

It is an arithmetic number, because the mean of its divisors is an integer number (14050158).

Almost surely, 2^54721631 is an apocalyptic number.

54721631 is a deficient number, since it is larger than the sum of its proper divisors (1479001).

54721631 is a wasteful number, since it uses less digits than its factorization.

54721631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479000.

The product of its digits is 5040, while the sum is 29.

The square root of 54721631 is about 7397.4070457154. The cubic root of 54721631 is about 379.6525702573.

The spelling of 54721631 in words is "fifty-four million, seven hundred twenty-one thousand, six hundred thirty-one".