55005507 has 16 divisors (see below), whose sum is σ = 81607680. Its totient is φ = 36617256.

The previous prime is 55005481. The next prime is 55005521. The reversal of 55005507 is 70550055.

It is not a de Polignac number, because 55005507 - 2¹⁵ = 54972739 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (55000507) 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, 28858 + ... + 30704.

It is an arithmetic number, because the mean of its divisors is an integer number (5100480).

Almost surely, 2^55005507 is an apocalyptic number.

55005507 is a deficient number, since it is larger than the sum of its proper divisors (26602173).

55005507 is a wasteful number, since it uses less digits than its factorization.

55005507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2959 (or 2953 counting only the distinct ones).

The product of its (nonzero) digits is 4375, while the sum is 27.

The square root of 55005507 is about 7416.5697596665. The cubic root of 55005507 is about 380.3079382945.

The spelling of 55005507 in words is "fifty-five million, five thousand, five hundred seven".