54207621 has 12 divisors (see below), whose sum is σ = 84323148. Its totient is φ = 33358464.

The previous prime is 54207613. The next prime is 54207631. The reversal of 54207621 is 12670245.

It can be written as a sum of positive squares in 2 ways, for example, as 13068225 + 41139396 = 3615^2 + 6414^2 .

It is not a de Polignac number, because 54207621 - 2³ = 54207613 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54207631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 231540 + ... + 231773.

It is an arithmetic number, because the mean of its divisors is an integer number (7026929).

Almost surely, 2^54207621 is an apocalyptic number.

It is an amenable number.

54207621 is a deficient number, since it is larger than the sum of its proper divisors (30115527).

54207621 is a wasteful number, since it uses less digits than its factorization.

54207621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463332 (or 463329 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 54207621 is about 7362.5824952933. The cubic root of 54207621 is about 378.4601140999.

Adding to 54207621 its reverse (12670245), we get a palindrome (66877866).

It can be divided in two parts, 5420 and 7621, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 54207621 in words is "fifty-four million, two hundred seven thousand, six hundred twenty-one".