55578733 has 12 divisors (see below), whose sum is σ = 64244320. Its totient is φ = 47098296.

The previous prime is 55578713. The next prime is 55578749. The reversal of 55578733 is 33787555.

It is not a de Polignac number, because 55578733 - 2⁵ = 55578701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55578733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55578713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232428 + ... + 232666.

Almost surely, 2^55578733 is an apocalyptic number.

It is an amenable number.

55578733 is a deficient number, since it is larger than the sum of its proper divisors (8665587).

55578733 is an equidigital number, since it uses as much as digits as its factorization.

55578733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624 (or 385 counting only the distinct ones).

The product of its digits is 441000, while the sum is 43.

The square root of 55578733 is about 7455.1145531105. The cubic root of 55578733 is about 381.6244699085.

The spelling of 55578733 in words is "fifty-five million, five hundred seventy-eight thousand, seven hundred thirty-three".