215022253520225 has 12 divisors (see below), whose sum is σ = 271658303694396. Its totient is φ = 168772183894080.

The previous prime is 215022253520189. The next prime is 215022253520279. The reversal of 215022253520225 is 522025352220512.

It can be written as a sum of positive squares in 6 ways, for example, as 4764336445696 + 210257917074529 = 2182736^2 + 14500273^2 .

It is not a de Polignac number, because 215022253520225 - 2⁴² = 210624207009121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81140471702 + ... + 81140474351.

It is an arithmetic number, because the mean of its divisors is an integer number (22638191974533).

Almost surely, 2^{215022253520225} is an apocalyptic number.

215022253520225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215022253520225 is a deficient number, since it is larger than the sum of its proper divisors (56636050174171).

215022253520225 is a wasteful number, since it uses less digits than its factorization.

215022253520225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162280946116 (or 162280946111 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 38.

The spelling of 215022253520225 in words is "two hundred fifteen trillion, twenty-two billion, two hundred fifty-three million, five hundred twenty thousand, two hundred twenty-five".