55023320 has 32 divisors (see below), whose sum is σ = 135058320. Its totient is φ = 20008320.

The previous prime is 55023313. The next prime is 55023377. The reversal of 55023320 is 2332055.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 55023292 and 55023301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62087 + ... + 62966.

Almost surely, 2^55023320 is an apocalyptic number.

It is an amenable number.

55023320 is an abundant number, since it is smaller than the sum of its proper divisors (80035000).

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

55023320 is a wasteful number, since it uses less digits than its factorization.

55023320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125075 (or 125071 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 55023320 is about 7417.7705545534. The cubic root of 55023320 is about 380.3489868763.

Adding to 55023320 its reverse (2332055), we get a palindrome (57355375).

The spelling of 55023320 in words is "fifty-five million, twenty-three thousand, three hundred twenty".