54531621 has 24 divisors (see below), whose sum is σ = 81244800. Its totient is φ = 35229600.

The previous prime is 54531619. The next prime is 54531637. The reversal of 54531621 is 12613545.

54531621 is a `hidden beast` number, since 5 + 4 + 5 + 31 + 621 = 666.

It is not a de Polignac number, because 54531621 - 2¹ = 54531619 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54531601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38280 + ... + 39678.

It is an arithmetic number, because the mean of its divisors is an integer number (3385200).

Almost surely, 2^54531621 is an apocalyptic number.

It is an amenable number.

54531621 is a deficient number, since it is larger than the sum of its proper divisors (26713179).

54531621 is a wasteful number, since it uses less digits than its factorization.

54531621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537 (or 1534 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 54531621 is about 7384.5528639180. The cubic root of 54531621 is about 379.2126379447.

The spelling of 54531621 in words is "fifty-four million, five hundred thirty-one thousand, six hundred twenty-one".