55806445 has 4 divisors (see below), whose sum is σ = 66967740. Its totient is φ = 44645152.

The previous prime is 55806431. The next prime is 55806451. The reversal of 55806445 is 54460855.

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 26071236 + 29735209 = 5106^2 + 5453^2 .

It is a cyclic number.

It is not a de Polignac number, because 55806445 - 2¹⁵ = 55773677 is a prime.

It is a super-2 number, since 2×55806445² = 6228718607076050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5580640 + ... + 5580649.

It is an arithmetic number, because the mean of its divisors is an integer number (16741935).

Almost surely, 2^55806445 is an apocalyptic number.

It is an amenable number.

55806445 is a deficient number, since it is larger than the sum of its proper divisors (11161295).

55806445 is a wasteful number, since it uses less digits than its factorization.

55806445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11161294.

The product of its (nonzero) digits is 96000, while the sum is 37.

The square root of 55806445 is about 7470.3711420518. The cubic root of 55806445 is about 382.1449451325.

The spelling of 55806445 in words is "fifty-five million, eight hundred six thousand, four hundred forty-five".