225221351502 has 64 divisors (see below), whose sum is σ = 537660840960. Its totient is φ = 61495382784.

The previous prime is 225221351501. The next prime is 225221351513. The reversal of 225221351502 is 205153122522.

It is a self number, because there is not a number n which added to its sum of digits gives 225221351502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225221351501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 966178 + ... + 1176410.

It is an arithmetic number, because the mean of its divisors is an integer number (8400950640).

Almost surely, 2^225221351502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225221351502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268830420480).

225221351502 is an abundant number, since it is smaller than the sum of its proper divisors (312439489458).

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

225221351502 is a wasteful number, since it uses less digits than its factorization.

225221351502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211377.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 225221351502 in words is "two hundred twenty-five billion, two hundred twenty-one million, three hundred fifty-one thousand, five hundred two".