55333632 has 72 divisors (see below), whose sum is σ = 148844080. Its totient is φ = 18247680.

The previous prime is 55333631. The next prime is 55333633. The reversal of 55333632 is 23633355.

It is an interprime number because it is at equal distance from previous prime (55333631) and next prime (55333633).

It is a super-2 number, since 2×55333632² = 6123621660622848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55333632.

It is not an unprimeable number, because it can be changed into a prime (55333631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83382 + ... + 84042.

Almost surely, 2^55333632 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 55333632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74422040).

55333632 is an abundant number, since it is smaller than the sum of its proper divisors (93510448).

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

55333632 is a wasteful number, since it uses less digits than its factorization.

55333632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789 (or 775 counting only the distinct ones).

The product of its digits is 24300, while the sum is 30.

The square root of 55333632 is about 7438.6579434734. The cubic root of 55333632 is about 381.0626580425.

Adding to 55333632 its reverse (23633355), we get a palindrome (78966987).

The spelling of 55333632 in words is "fifty-five million, three hundred thirty-three thousand, six hundred thirty-two".