215288222152 has 8 divisors (see below), whose sum is σ = 403665416550. Its totient is φ = 107644111072.

The previous prime is 215288222117. The next prime is 215288222161. The reversal of 215288222152 is 251222882512.

It can be written as a sum of positive squares in only one way, i.e., 204291344196 + 10996877956 = 451986^2 + 104866^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×215288222152² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13455513877 + ... + 13455513892.

Almost surely, 2^215288222152 is an apocalyptic number.

It is an amenable number.

215288222152 is a deficient number, since it is larger than the sum of its proper divisors (188377194398).

215288222152 is a wasteful number, since it uses less digits than its factorization.

215288222152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26911027775 (or 26911027771 counting only the distinct ones).

The product of its digits is 102400, while the sum is 40.

The spelling of 215288222152 in words is "two hundred fifteen billion, two hundred eighty-eight million, two hundred twenty-two thousand, one hundred fifty-two".