55207845 has 128 divisors (see below), whose sum is σ = 126074880. Its totient is φ = 22256640.

The previous prime is 55207837. The next prime is 55207847. The reversal of 55207845 is 54870255.

It is a happy number.

It is not a de Polignac number, because 55207845 - 2³ = 55207837 is a prime.

It is a super-2 number, since 2×55207845² = 6095812299088050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55207847) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 488509 + ... + 488621.

It is an arithmetic number, because the mean of its divisors is an integer number (984960).

Almost surely, 2^55207845 is an apocalyptic number.

55207845 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55207845 is an abundant number, since it is smaller than the sum of its proper divisors (70867035).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55207845 is a wasteful number, since it uses less digits than its factorization.

55207845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 55207845 is about 7430.1981803987. The cubic root of 55207845 is about 380.7736891475.

The spelling of 55207845 in words is "fifty-five million, two hundred seven thousand, eight hundred forty-five".