55253730 has 64 divisors (see below), whose sum is σ = 153031680. Its totient is φ = 12506304.

The previous prime is 55253713. The next prime is 55253741. The reversal of 55253730 is 3735255.

55253730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21241 + ... + 23699.

It is an arithmetic number, because the mean of its divisors is an integer number (2391120).

Almost surely, 2^55253730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55253730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76515840).

55253730 is an abundant number, since it is smaller than the sum of its proper divisors (97777950).

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

55253730 is a wasteful number, since it uses less digits than its factorization.

55253730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583.

The product of its (nonzero) digits is 15750, while the sum is 30.

The square root of 55253730 is about 7433.2852763768. The cubic root of 55253730 is about 380.8791509860.

Adding to 55253730 its reverse (3735255), we get a palindrome (58988985).

The spelling of 55253730 in words is "fifty-five million, two hundred fifty-three thousand, seven hundred thirty".