215531242225226 has 8 divisors (see below), whose sum is σ = 323296983963300. Its totient is φ = 107765580904128.

The previous prime is 215531242225183. The next prime is 215531242225297. The reversal of 215531242225226 is 622522242135512.

It can be written as a sum of positive squares in 2 ways, for example, as 212732463793201 + 2798778432025 = 14585351^2 + 1672955^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×215531242225226² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12885401 + ... + 24435548.

Almost surely, 2^{215531242225226} is an apocalyptic number.

215531242225226 is a deficient number, since it is larger than the sum of its proper divisors (107765741738074).

215531242225226 is a wasteful number, since it uses less digits than its factorization.

215531242225226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40208488.

The product of its digits is 1152000, while the sum is 44.

The spelling of 215531242225226 in words is "two hundred fifteen trillion, five hundred thirty-one billion, two hundred forty-two million, two hundred twenty-five thousand, two hundred twenty-six".