55663312 has 60 divisors (see below), whose sum is σ = 119054880. Its totient is φ = 25160256.

The previous prime is 55663291. The next prime is 55663319. The reversal of 55663312 is 21336655.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55663319) 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, 132639 + ... + 133057.

It is an arithmetic number, because the mean of its divisors is an integer number (1984248).

Almost surely, 2^55663312 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 55663312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59527440).

55663312 is an abundant number, since it is smaller than the sum of its proper divisors (63391568).

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

55663312 is a wasteful number, since it uses less digits than its factorization.

55663312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 463 counting only the distinct ones).

The product of its digits is 16200, while the sum is 31.

The square root of 55663312 is about 7460.7849452990. The cubic root of 55663312 is about 381.8179555279.

Adding to 55663312 its reverse (21336655), we get a palindrome (76999967).

The spelling of 55663312 in words is "fifty-five million, six hundred sixty-three thousand, three hundred twelve".