54421521251 has 4 divisors (see below), whose sum is σ = 54427532472. Its totient is φ = 54415510032.

The previous prime is 54421521223. The next prime is 54421521289. The reversal of 54421521251 is 15212512445.

54421521251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54421521251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54421581251) 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, 2992010 + ... + 3010143.

It is an arithmetic number, because the mean of its divisors is an integer number (13606883118).

Almost surely, 2^54421521251 is an apocalyptic number.

54421521251 is a deficient number, since it is larger than the sum of its proper divisors (6011221).

54421521251 is an equidigital number, since it uses as much as digits as its factorization.

54421521251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6011220.

The product of its digits is 16000, while the sum is 32.

The spelling of 54421521251 in words is "fifty-four billion, four hundred twenty-one million, five hundred twenty-one thousand, two hundred fifty-one".