55920045 has 16 divisors (see below), whose sum is σ = 89635392. Its totient is φ = 29769600.

The previous prime is 55920031. The next prime is 55920049. The reversal of 55920045 is 54002955.

It is a happy number.

It is not a de Polignac number, because 55920045 - 2¹² = 55915949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55919994 and 55920021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55920049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5914 + ... + 12116.

It is an arithmetic number, because the mean of its divisors is an integer number (5602212).

Almost surely, 2^55920045 is an apocalyptic number.

It is an amenable number.

55920045 is a deficient number, since it is larger than the sum of its proper divisors (33715347).

55920045 is a wasteful number, since it uses less digits than its factorization.

55920045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6812.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 55920045 is about 7477.9706471743. The cubic root of 55920045 is about 382.4040683853.

The spelling of 55920045 in words is "fifty-five million, nine hundred twenty thousand, forty-five".