215071212 has 24 divisors (see below), whose sum is σ = 508902912. Its totient is φ = 70680400.

The previous prime is 215071133. The next prime is 215071223. The reversal of 215071212 is 212170512.

It is a super-2 number, since 2×215071212² = 92511252462297888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125364 + ... + 127067.

It is an arithmetic number, because the mean of its divisors is an integer number (21204288).

Almost surely, 2^215071212 is an apocalyptic number.

It is an amenable number.

215071212 is an abundant number, since it is smaller than the sum of its proper divisors (293831700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215071212 is a wasteful number, since it uses less digits than its factorization.

215071212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252509 (or 252507 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 215071212 is about 14665.3064066183. The cubic root of 215071212 is about 599.1387755232.

The spelling of 215071212 in words is "two hundred fifteen million, seventy-one thousand, two hundred twelve".