55775511 has 24 divisors (see below), whose sum is σ = 89766144. Its totient is φ = 33081360.

The previous prime is 55775509. The next prime is 55775513. The reversal of 55775511 is 11557755.

It is an interprime number because it is at equal distance from previous prime (55775509) and next prime (55775513).

It is not a de Polignac number, because 55775511 - 2¹ = 55775509 is a prime.

It is a super-2 number, since 2×55775511² = 6221815254622242, which contains 22 as substring.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55775513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1341 + ... + 10646.

It is an arithmetic number, because the mean of its divisors is an integer number (3740256).

Almost surely, 2^55775511 is an apocalyptic number.

55775511 is a deficient number, since it is larger than the sum of its proper divisors (33990633).

55775511 is a wasteful number, since it uses less digits than its factorization.

55775511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12051 (or 12048 counting only the distinct ones).

The product of its digits is 30625, while the sum is 36.

The square root of 55775511 is about 7468.3004090623. The cubic root of 55775511 is about 382.0743233216.

The spelling of 55775511 in words is "fifty-five million, seven hundred seventy-five thousand, five hundred eleven".