55775479 has 12 divisors (see below), whose sum is σ = 58213632. Its totient is φ = 53434080.

The previous prime is 55775413. The next prime is 55775509. The reversal of 55775479 is 97457755.

It is a happy number.

It is not a de Polignac number, because 55775479 - 2²¹ = 53678327 is a prime.

It is a super-2 number, since 2×55775479² = 6221808115358882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55775179) 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, 121819 + ... + 122275.

It is an arithmetic number, because the mean of its divisors is an integer number (4851136).

Almost surely, 2^55775479 is an apocalyptic number.

55775479 is a deficient number, since it is larger than the sum of its proper divisors (2438153).

55775479 is a wasteful number, since it uses less digits than its factorization.

55775479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 615 counting only the distinct ones).

The product of its digits is 1543500, while the sum is 49.

The square root of 55775479 is about 7468.2982666736. The cubic root of 55775479 is about 382.0742502526.

The spelling of 55775479 in words is "fifty-five million, seven hundred seventy-five thousand, four hundred seventy-nine".