55722689 has 4 divisors (see below), whose sum is σ = 60788400. Its totient is φ = 50656980.

The previous prime is 55722679. The next prime is 55722701. The reversal of 55722689 is 98622755.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55722689 - 2¹⁶ = 55657153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55722619) 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, 2532839 + ... + 2532860.

It is an arithmetic number, because the mean of its divisors is an integer number (15197100).

Almost surely, 2^55722689 is an apocalyptic number.

It is an amenable number.

55722689 is a deficient number, since it is larger than the sum of its proper divisors (5065711).

55722689 is a wasteful number, since it uses less digits than its factorization.

55722689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5065710.

The product of its digits is 302400, while the sum is 44.

The square root of 55722689 is about 7464.7631576628. The cubic root of 55722689 is about 381.9536711813.

The spelling of 55722689 in words is "fifty-five million, seven hundred twenty-two thousand, six hundred eighty-nine".