55399356 has 48 divisors (see below), whose sum is σ = 148270080. Its totient is φ = 17869680.

The previous prime is 55399349. The next prime is 55399369. The reversal of 55399356 is 65399355.

It is a happy number.

55399356 is a `hidden beast` number, since 553 + 9 + 93 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4926 + ... + 11621.

It is an arithmetic number, because the mean of its divisors is an integer number (3088960).

Almost surely, 2^55399356 is an apocalyptic number.

It is an amenable number.

55399356 is an abundant number, since it is smaller than the sum of its proper divisors (92870724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55399356 is a wasteful number, since it uses less digits than its factorization.

55399356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16591 (or 16583 counting only the distinct ones).

The product of its digits is 546750, while the sum is 45.

The square root of 55399356 is about 7443.0743648038. The cubic root of 55399356 is about 381.2134707991.

Subtracting 55399356 from its reverse (65399355), we obtain a palindrome (9999999).

It can be divided in two parts, 55399 and 356, that added together give a palindrome (55755).

The spelling of 55399356 in words is "fifty-five million, three hundred ninety-nine thousand, three hundred fifty-six".