22215510310225 has 6 divisors (see below), whose sum is σ = 27547232784710. Its totient is φ = 17772408248160.

The previous prime is 22215510310187. The next prime is 22215510310241. The reversal of 22215510310225 is 52201301551222.

It can be written as a sum of positive squares in 3 ways, for example, as 55679009296 + 22159831300929 = 235964^2 + 4707423^2 .

It is not a de Polignac number, because 22215510310225 - 2²⁵ = 22215476755793 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 444310206180 + ... + 444310206229.

Almost surely, 2^{22215510310225} is an apocalyptic number.

22215510310225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22215510310225 is a deficient number, since it is larger than the sum of its proper divisors (5331722474485).

22215510310225 is an equidigital number, since it uses as much as digits as its factorization.

22215510310225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888620412419 (or 888620412414 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 22215510310225 its reverse (52201301551222), we get a palindrome (74416811861447).

The spelling of 22215510310225 in words is "twenty-two trillion, two hundred fifteen billion, five hundred ten million, three hundred ten thousand, two hundred twenty-five".