55783329 has 32 divisors (see below), whose sum is σ = 88467456. Its totient is φ = 30602880.

The previous prime is 55783319. The next prime is 55783361. The reversal of 55783329 is 92338755.

It is not a de Polignac number, because 55783329 - 2²⁴ = 39006113 is a prime.

It is a super-2 number, since 2×55783329² = 6223559588644482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55783319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57204 + ... + 58170.

It is an arithmetic number, because the mean of its divisors is an integer number (2764608).

Almost surely, 2^55783329 is an apocalyptic number.

It is an amenable number.

55783329 is a deficient number, since it is larger than the sum of its proper divisors (32684127).

55783329 is a wasteful number, since it uses less digits than its factorization.

55783329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085.

The product of its digits is 226800, while the sum is 42.

The square root of 55783329 is about 7468.8238029826. The cubic root of 55783329 is about 382.0921741516.

The spelling of 55783329 in words is "fifty-five million, seven hundred eighty-three thousand, three hundred twenty-nine".