54457721 has 8 divisors (see below), whose sum is σ = 57041664. Its totient is φ = 51891840.

The previous prime is 54457703. The next prime is 54457759. The reversal of 54457721 is 12775445.

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

It is a cyclic number.

It is not a de Polignac number, because 54457721 - 2¹⁴ = 54441337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54457321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1865 + ... + 10601.

It is an arithmetic number, because the mean of its divisors is an integer number (7130208).

Almost surely, 2^54457721 is an apocalyptic number.

It is an amenable number.

54457721 is a deficient number, since it is larger than the sum of its proper divisors (2583943).

54457721 is a wasteful number, since it uses less digits than its factorization.

54457721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9031.

The product of its digits is 39200, while the sum is 35.

The square root of 54457721 is about 7379.5474793513. The cubic root of 54457721 is about 379.0412604207.

The spelling of 54457721 in words is "fifty-four million, four hundred fifty-seven thousand, seven hundred twenty-one".