55505511 has 12 divisors (see below), whose sum is σ = 80290392. Its totient is φ = 36950256.

The previous prime is 55505497. The next prime is 55505519. The reversal of 55505511 is 11550555.

It is not a de Polignac number, because 55505511 - 2⁷ = 55505383 is a prime.

It is a super-2 number, since 2×55505511² = 6161723502742242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2740 + ... + 10886.

It is an arithmetic number, because the mean of its divisors is an integer number (6690866).

Almost surely, 2^55505511 is an apocalyptic number.

55505511 is a deficient number, since it is larger than the sum of its proper divisors (24784881).

55505511 is a wasteful number, since it uses less digits than its factorization.

55505511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8910 (or 8907 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 27.

The square root of 55505511 is about 7450.2020777963. The cubic root of 55505511 is about 381.4568063335.

The spelling of 55505511 in words is "fifty-five million, five hundred five thousand, five hundred eleven".