55550907 has 8 divisors (see below), whose sum is σ = 82297680. Its totient is φ = 37033920.

The previous prime is 55550903. The next prime is 55550923. The reversal of 55550907 is 70905555.

It is a happy number.

It is not a de Polignac number, because 55550907 - 2² = 55550903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55550903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1028694 + ... + 1028747.

It is an arithmetic number, because the mean of its divisors is an integer number (10287210).

Almost surely, 2^55550907 is an apocalyptic number.

55550907 is a deficient number, since it is larger than the sum of its proper divisors (26746773).

55550907 is a wasteful number, since it uses less digits than its factorization.

55550907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057450 (or 2057444 counting only the distinct ones).

The product of its (nonzero) digits is 39375, while the sum is 36.

The square root of 55550907 is about 7453.2480838893. The cubic root of 55550907 is about 381.5607713521.

The spelling of 55550907 in words is "fifty-five million, five hundred fifty thousand, nine hundred seven".