55523777 has 4 divisors (see below), whose sum is σ = 57438420. Its totient is φ = 53609136.

The previous prime is 55523773. The next prime is 55523801. The reversal of 55523777 is 77732555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12503296 + 43020481 = 3536^2 + 6559^2 .

It is a cyclic number.

It is not a de Polignac number, because 55523777 - 2² = 55523773 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55523773) 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, 957278 + ... + 957335.

It is an arithmetic number, because the mean of its divisors is an integer number (14359605).

Almost surely, 2^55523777 is an apocalyptic number.

It is an amenable number.

55523777 is a deficient number, since it is larger than the sum of its proper divisors (1914643).

55523777 is a wasteful number, since it uses less digits than its factorization.

55523777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914642.

The product of its digits is 257250, while the sum is 41.

The square root of 55523777 is about 7451.4278497480. The cubic root of 55523777 is about 381.4986455775.

The spelling of 55523777 in words is "fifty-five million, five hundred twenty-three thousand, seven hundred seventy-seven".