55426565 has 4 divisors (see below), whose sum is σ = 66511884. Its totient is φ = 44341248.

The previous prime is 55426561. The next prime is 55426597. The reversal of 55426565 is 56562455.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42588676 + 12837889 = 6526^2 + 3583^2 .

It is a cyclic number.

It is not a de Polignac number, because 55426565 - 2² = 55426561 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 (55426561) 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, 5542652 + ... + 5542661.

It is an arithmetic number, because the mean of its divisors is an integer number (16627971).

Almost surely, 2^55426565 is an apocalyptic number.

It is an amenable number.

55426565 is a deficient number, since it is larger than the sum of its proper divisors (11085319).

55426565 is a wasteful number, since it uses less digits than its factorization.

55426565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11085318.

The product of its digits is 180000, while the sum is 38.

The square root of 55426565 is about 7444.9019469702. The cubic root of 55426565 is about 381.2758706802.

The spelling of 55426565 in words is "fifty-five million, four hundred twenty-six thousand, five hundred sixty-five".