55206945 has 12 divisors (see below), whose sum is σ = 95692116. Its totient is φ = 29443680.

The previous prime is 55206929. The next prime is 55206979. The reversal of 55206945 is 54960255.

55206945 is a `hidden beast` number, since 552 + 0 + 69 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12787776 + 42419169 = 3576^2 + 6513^2 .

It is not a de Polignac number, because 55206945 - 2⁴ = 55206929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 613366 + ... + 613455.

It is an arithmetic number, because the mean of its divisors is an integer number (7974343).

Almost surely, 2^55206945 is an apocalyptic number.

It is an amenable number.

55206945 is a deficient number, since it is larger than the sum of its proper divisors (40485171).

55206945 is a wasteful number, since it uses less digits than its factorization.

55206945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226832 (or 1226829 counting only the distinct ones).

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

The square root of 55206945 is about 7430.1376164914. The cubic root of 55206945 is about 380.7716200081.

The spelling of 55206945 in words is "fifty-five million, two hundred six thousand, nine hundred forty-five".