55042045 has 4 divisors (see below), whose sum is σ = 66050460. Its totient is φ = 44033632.

The previous prime is 55042033. The next prime is 55042061. The reversal of 55042045 is 54024055.

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 19971961 + 35070084 = 4469^2 + 5922^2 .

It is a cyclic number.

It is not a de Polignac number, because 55042045 - 2¹⁵ = 55009277 is a prime.

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, 5504200 + ... + 5504209.

It is an arithmetic number, because the mean of its divisors is an integer number (16512615).

Almost surely, 2^55042045 is an apocalyptic number.

It is an amenable number.

55042045 is a deficient number, since it is larger than the sum of its proper divisors (11008415).

55042045 is a wasteful number, since it uses less digits than its factorization.

55042045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11008414.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 55042045 is about 7419.0326188796. The cubic root of 55042045 is about 380.3921275363.

The spelling of 55042045 in words is "fifty-five million, forty-two thousand, forty-five".