54953721 has 24 divisors (see below), whose sum is σ = 83734560. Its totient is φ = 36005472.

The previous prime is 54953713. The next prime is 54953729. The reversal of 54953721 is 12735945.

It is an interprime number because it is at equal distance from previous prime (54953713) and next prime (54953729).

It is not a de Polignac number, because 54953721 - 2³ = 54953713 is a prime.

It is a super-2 number, since 2×54953721² = 6039822903491682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (54953729) 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, 12421 + ... + 16253.

It is an arithmetic number, because the mean of its divisors is an integer number (3488940).

Almost surely, 2^54953721 is an apocalyptic number.

It is an amenable number.

54953721 is a deficient number, since it is larger than the sum of its proper divisors (28780839).

54953721 is an equidigital number, since it uses as much as digits as its factorization.

54953721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3907 (or 3895 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 54953721 is about 7413.0777009283. The cubic root of 54953721 is about 380.1885513953.

It can be divided in two parts, 5495 and 3721, that added together give a square (9216 = 96²).

The spelling of 54953721 in words is "fifty-four million, nine hundred fifty-three thousand, seven hundred twenty-one".