55775311 has 4 divisors (see below), whose sum is σ = 55793032. Its totient is φ = 55757592.

The previous prime is 55775309. The next prime is 55775327. The reversal of 55775311 is 11357755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11357755 = 5 ⋅2271551.

It is a cyclic number.

It is not a de Polignac number, because 55775311 - 2¹ = 55775309 is a prime.

It is a super-2 number, since 2×55775311² = 6221770634293442, 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 (55775341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2721 + ... + 10906.

It is an arithmetic number, because the mean of its divisors is an integer number (13948258).

Almost surely, 2^55775311 is an apocalyptic number.

55775311 is a deficient number, since it is larger than the sum of its proper divisors (17721).

55775311 is a wasteful number, since it uses less digits than its factorization.

55775311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17720.

The product of its digits is 18375, while the sum is 34.

The square root of 55775311 is about 7468.2870191229. The cubic root of 55775311 is about 382.0738666399.

The spelling of 55775311 in words is "fifty-five million, seven hundred seventy-five thousand, three hundred eleven".