54621571 has 4 divisors (see below), whose sum is σ = 54653544. Its totient is φ = 54589600.

The previous prime is 54621563. The next prime is 54621613. The reversal of 54621571 is 17512645.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17512645 = 5 ⋅3502529.

It is a cyclic number.

It is not a de Polignac number, because 54621571 - 2³ = 54621563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54621071) 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, 13270 + ... + 16891.

It is an arithmetic number, because the mean of its divisors is an integer number (13663386).

Almost surely, 2^54621571 is an apocalyptic number.

54621571 is a deficient number, since it is larger than the sum of its proper divisors (31973).

54621571 is a wasteful number, since it uses less digits than its factorization.

54621571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31972.

The product of its digits is 8400, while the sum is 31.

The square root of 54621571 is about 7390.6407705963. The cubic root of 54621571 is about 379.4210273672.

The spelling of 54621571 in words is "fifty-four million, six hundred twenty-one thousand, five hundred seventy-one".