55309907 has 8 divisors (see below), whose sum is σ = 56548800. Its totient is φ = 54083304.

The previous prime is 55309901. The next prime is 55309909. The reversal of 55309907 is 70990355.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55309907 - 2²⁴ = 38532691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55309901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6344 + ... + 12282.

It is an arithmetic number, because the mean of its divisors is an integer number (7068600).

Almost surely, 2^55309907 is an apocalyptic number.

55309907 is a deficient number, since it is larger than the sum of its proper divisors (1238893).

55309907 is a wasteful number, since it uses less digits than its factorization.

55309907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6145.

The product of its (nonzero) digits is 42525, while the sum is 38.

The square root of 55309907 is about 7437.0630627957. The cubic root of 55309907 is about 381.0081884330.

The spelling of 55309907 in words is "fifty-five million, three hundred nine thousand, nine hundred seven".