55572452181 has 12 divisors (see below), whose sum is σ = 80274088908. Its totient is φ = 37047023424.

The previous prime is 55572452123. The next prime is 55572452207. The reversal of 55572452181 is 18125427555.

It is a happy number.

55572452181 is a `hidden beast` number, since 5 + 55 + 72 + 4 + 521 + 8 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33684729156 + 21887723025 = 183534^2 + 147945^2 .

It is not a de Polignac number, because 55572452181 - 2¹⁹ = 55571927893 is a prime.

It is a super-2 number, since 2×55572452181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55572452981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222321 + ... + 400713.

It is an arithmetic number, because the mean of its divisors is an integer number (6689507409).

Almost surely, 2^55572452181 is an apocalyptic number.

It is an amenable number.

55572452181 is a deficient number, since it is larger than the sum of its proper divisors (24701636727).

55572452181 is a wasteful number, since it uses less digits than its factorization.

55572452181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213012 (or 213009 counting only the distinct ones).

The product of its digits is 560000, while the sum is 45.

The spelling of 55572452181 in words is "fifty-five billion, five hundred seventy-two million, four hundred fifty-two thousand, one hundred eighty-one".