55561107 has 16 divisors (see below), whose sum is σ = 84972800. Its totient is φ = 31633632.

The previous prime is 55561043. The next prime is 55561139. The reversal of 55561107 is 70116555.

It is not a de Polignac number, because 55561107 - 2⁶ = 55561043 is a prime.

It is a super-2 number, since 2×55561107² = 6174073222130898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55561147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1269 + ... + 10617.

It is an arithmetic number, because the mean of its divisors is an integer number (5310800).

Almost surely, 2^55561107 is an apocalyptic number.

55561107 is a deficient number, since it is larger than the sum of its proper divisors (29411693).

55561107 is a wasteful number, since it uses less digits than its factorization.

55561107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9642.

The product of its (nonzero) digits is 5250, while the sum is 30.

The square root of 55561107 is about 7453.9323179111. The cubic root of 55561107 is about 381.5841233962.

The spelling of 55561107 in words is "fifty-five million, five hundred sixty-one thousand, one hundred seven".