55020443251 has 4 divisors (see below), whose sum is σ = 55140838552. Its totient is φ = 54900047952.

The previous prime is 55020443207. The next prime is 55020443311. The reversal of 55020443251 is 15234402055.

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 55020443251 - 2⁷ = 55020443123 is a prime.

It is a super-2 number, since 2×55020443251² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55020443351) 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, 60196965 + ... + 60197878.

It is an arithmetic number, because the mean of its divisors is an integer number (13785209638).

Almost surely, 2^55020443251 is an apocalyptic number.

55020443251 is a deficient number, since it is larger than the sum of its proper divisors (120395301).

55020443251 is a wasteful number, since it uses less digits than its factorization.

55020443251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120395300.

The product of its (nonzero) digits is 24000, while the sum is 31.

The spelling of 55020443251 in words is "fifty-five billion, twenty million, four hundred forty-three thousand, two hundred fifty-one".