55533750 has 80 divisors (see below), whose sum is σ = 141704640. Its totient is φ = 14500000.

The previous prime is 55533703. The next prime is 55533763. The reversal of 55533750 is 5733555.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 221125 + ... + 221375.

It is an arithmetic number, because the mean of its divisors is an integer number (1771308).

Almost surely, 2^55533750 is an apocalyptic number.

55533750 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55533750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70852320).

55533750 is an abundant number, since it is smaller than the sum of its proper divisors (86170890).

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

55533750 is a wasteful number, since it uses less digits than its factorization.

55533750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 39375, while the sum is 33.

The square root of 55533750 is about 7452.0970203024. The cubic root of 55533750 is about 381.5214853915.

The spelling of 55533750 in words is "fifty-five million, five hundred thirty-three thousand, seven hundred fifty".