55413945 has 12 divisors (see below), whose sum is σ = 96050916. Its totient is φ = 29554080.

The previous prime is 55413929. The next prime is 55413949. The reversal of 55413945 is 54931455.

55413945 is a `hidden beast` number, since 554 + 13 + 94 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17665209 + 37748736 = 4203^2 + 6144^2 .

It is not a de Polignac number, because 55413945 - 2⁴ = 55413929 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55413949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 615666 + ... + 615755.

It is an arithmetic number, because the mean of its divisors is an integer number (8004243).

Almost surely, 2^55413945 is an apocalyptic number.

It is an amenable number.

55413945 is a deficient number, since it is larger than the sum of its proper divisors (40636971).

55413945 is a wasteful number, since it uses less digits than its factorization.

55413945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231432 (or 1231429 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 55413945 is about 7444.0543388667. The cubic root of 55413945 is about 381.2469310870.

The spelling of 55413945 in words is "fifty-five million, four hundred thirteen thousand, nine hundred forty-five".