55063320 has 128 divisors (see below), whose sum is σ = 181923840. Its totient is φ = 13248000.

The previous prime is 55063319. The next prime is 55063399. The reversal of 55063320 is 2336055.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72945 + ... + 73695.

It is an arithmetic number, because the mean of its divisors is an integer number (1421280).

Almost surely, 2^55063320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55063320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90961920).

55063320 is an abundant number, since it is smaller than the sum of its proper divisors (126860520).

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

55063320 is a wasteful number, since it uses less digits than its factorization.

55063320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825 (or 821 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 55063320 is about 7420.4662926261. The cubic root of 55063320 is about 380.4411312876.

Adding to 55063320 its reverse (2336055), we get a palindrome (57399375).

The spelling of 55063320 in words is "fifty-five million, sixty-three thousand, three hundred twenty".