215222041325 has 6 divisors (see below), whose sum is σ = 266875331274. Its totient is φ = 172177633040.

The previous prime is 215222041319. The next prime is 215222041327. The reversal of 215222041325 is 523140222512.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 5243642569 + 209978398756 = 72413^2 + 458234^2 .

It is not a de Polignac number, because 215222041325 - 2¹⁰ = 215222040301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215222041327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4304440802 + ... + 4304440851.

It is an arithmetic number, because the mean of its divisors is an integer number (44479221879).

Almost surely, 2^215222041325 is an apocalyptic number.

215222041325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215222041325 is a deficient number, since it is larger than the sum of its proper divisors (51653289949).

215222041325 is an equidigital number, since it uses as much as digits as its factorization.

215222041325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8608881663 (or 8608881658 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 215222041325 its reverse (523140222512), we get a palindrome (738362263837).

The spelling of 215222041325 in words is "two hundred fifteen billion, two hundred twenty-two million, forty-one thousand, three hundred twenty-five".