55321536 has 84 divisors (see below), whose sum is σ = 155644088. Its totient is φ = 17338368.

The previous prime is 55321529. The next prime is 55321543. The reversal of 55321536 is 63512355.

It is an interprime number because it is at equal distance from previous prime (55321529) and next prime (55321543).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54990 + ... + 55986.

Almost surely, 2^55321536 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 55321536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77822044).

55321536 is an abundant number, since it is smaller than the sum of its proper divisors (100322552).

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

55321536 is a wasteful number, since it uses less digits than its factorization.

55321536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046 (or 1019 counting only the distinct ones).

The product of its digits is 13500, while the sum is 30.

The square root of 55321536 is about 7437.8448491482. The cubic root of 55321536 is about 381.0348890970.

The spelling of 55321536 in words is "fifty-five million, three hundred twenty-one thousand, five hundred thirty-six".