54021799 has 4 divisors (see below), whose sum is σ = 58177336. Its totient is φ = 49866264.

The previous prime is 54021763. The next prime is 54021811. The reversal of 54021799 is 99712045.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 54021799 - 2²⁵ = 20467367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54121799) 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, 2077749 + ... + 2077774.

It is an arithmetic number, because the mean of its divisors is an integer number (14544334).

Almost surely, 2^54021799 is an apocalyptic number.

54021799 is a deficient number, since it is larger than the sum of its proper divisors (4155537).

54021799 is a wasteful number, since it uses less digits than its factorization.

54021799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4155536.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 54021799 is about 7349.9523127705. The cubic root of 54021799 is about 378.0271692723.

The spelling of 54021799 in words is "fifty-four million, twenty-one thousand, seven hundred ninety-nine".