225721202370 has 16 divisors (see below), whose sum is σ = 541730885760. Its totient is φ = 60192320624.

The previous prime is 225721202359. The next prime is 225721202389. The reversal of 225721202370 is 73202127522.

It is a super-2 number, since 2×225721202370² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3762020010 + ... + 3762020069.

It is an arithmetic number, because the mean of its divisors is an integer number (33858180360).

Almost surely, 2^225721202370 is an apocalyptic number.

225721202370 is an abundant number, since it is smaller than the sum of its proper divisors (316009683390).

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

225721202370 is a wasteful number, since it uses less digits than its factorization.

225721202370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7524040089.

The product of its (nonzero) digits is 23520, while the sum is 33.

Adding to 225721202370 its reverse (73202127522), we get a palindrome (298923329892).

The spelling of 225721202370 in words is "two hundred twenty-five billion, seven hundred twenty-one million, two hundred two thousand, three hundred seventy".