55540445 has 16 divisors (see below), whose sum is σ = 72294768. Its totient is φ = 40796160.

The previous prime is 55540427. The next prime is 55540451. The reversal of 55540445 is 54404555.

It can be written as a sum of positive squares in 8 ways, for example, as 573049 + 54967396 = 757^2 + 7414^2 .

It is not a de Polignac number, because 55540445 - 2²⁴ = 38763229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4484 + ... + 11453.

It is an arithmetic number, because the mean of its divisors is an integer number (4518423).

Almost surely, 2^55540445 is an apocalyptic number.

It is an amenable number.

55540445 is a deficient number, since it is larger than the sum of its proper divisors (16754323).

55540445 is a wasteful number, since it uses less digits than its factorization.

55540445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16000.

The product of its (nonzero) digits is 40000, while the sum is 32.

The square root of 55540445 is about 7452.5462091825. The cubic root of 55540445 is about 381.5368165112.

The spelling of 55540445 in words is "fifty-five million, five hundred forty thousand, four hundred forty-five".