55222552 has 64 divisors (see below), whose sum is σ = 130141440. Its totient is φ = 21340800.

The previous prime is 55222549. The next prime is 55222553. The reversal of 55222552 is 25522255.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 55222552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55222553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96427 + ... + 96997.

It is an arithmetic number, because the mean of its divisors is an integer number (2033460).

Almost surely, 2^55222552 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 55222552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65070720).

55222552 is an abundant number, since it is smaller than the sum of its proper divisors (74918888).

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

55222552 is a wasteful number, since it uses less digits than its factorization.

55222552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752 (or 748 counting only the distinct ones).

The product of its digits is 10000, while the sum is 28.

The square root of 55222552 is about 7431.1877920020. The cubic root of 55222552 is about 380.8074979987.

It can be divided in two parts, 552 and 22552, that added together give a square (23104 = 152²).

The spelling of 55222552 in words is "fifty-five million, two hundred twenty-two thousand, five hundred fifty-two".