55572909 has 24 divisors (see below), whose sum is σ = 86588928. Its totient is φ = 31610880.

The previous prime is 55572893. The next prime is 55572919. The reversal of 55572909 is 90927555.

It is not a de Polignac number, because 55572909 - 2⁴ = 55572893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55572919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37044 + ... + 38514.

It is an arithmetic number, because the mean of its divisors is an integer number (3607872).

Almost surely, 2^55572909 is an apocalyptic number.

It is an amenable number.

55572909 is a deficient number, since it is larger than the sum of its proper divisors (31016019).

55572909 is a wasteful number, since it uses less digits than its factorization.

55572909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745 (or 1738 counting only the distinct ones).

The product of its (nonzero) digits is 141750, while the sum is 42.

The square root of 55572909 is about 7454.7239385506. The cubic root of 55572909 is about 381.6111395185.

The spelling of 55572909 in words is "fifty-five million, five hundred seventy-two thousand, nine hundred nine".