55831689 has 24 divisors (see below), whose sum is σ = 86258952. Its totient is φ = 34675200.

The previous prime is 55831681. The next prime is 55831697. The reversal of 55831689 is 98613855.

55831689 is a `hidden beast` number, since 5 + 583 + 1 + 68 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (55831681) and next prime (55831697).

It can be written as a sum of positive squares in 4 ways, for example, as 10673289 + 45158400 = 3267^2 + 6720^2 .

It is not a de Polignac number, because 55831689 - 2³ = 55831681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55831681) 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, 13647 + ... + 17259.

It is an arithmetic number, because the mean of its divisors is an integer number (3594123).

Almost surely, 2^55831689 is an apocalyptic number.

It is an amenable number.

55831689 is a deficient number, since it is larger than the sum of its proper divisors (30427263).

55831689 is a wasteful number, since it uses less digits than its factorization.

55831689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3737 (or 3734 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 55831689 is about 7472.0605591764. The cubic root of 55831689 is about 382.2025574314.

It can be divided in two parts, 55 and 831689, that added together give a square (831744 = 912²).

The spelling of 55831689 in words is "fifty-five million, eight hundred thirty-one thousand, six hundred eighty-nine".