55333989 has 8 divisors (see below), whose sum is σ = 81976320. Its totient is φ = 36889308.

The previous prime is 55333979. The next prime is 55334009. The reversal of 55333989 is 98933355.

55333989 is a `hidden beast` number, since 5 + 533 + 39 + 89 = 666.

It is not a de Polignac number, because 55333989 - 2¹² = 55329893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55333939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1024677 + ... + 1024730.

It is an arithmetic number, because the mean of its divisors is an integer number (10247040).

Almost surely, 2^55333989 is an apocalyptic number.

It is an amenable number.

55333989 is a deficient number, since it is larger than the sum of its proper divisors (26642331).

55333989 is a wasteful number, since it uses less digits than its factorization.

55333989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049416 (or 2049410 counting only the distinct ones).

The product of its digits is 437400, while the sum is 45.

The square root of 55333989 is about 7438.6819396987. The cubic root of 55333989 is about 381.0634775505.

The spelling of 55333989 in words is "fifty-five million, three hundred thirty-three thousand, nine hundred eighty-nine".