215525214 has 12 divisors (see below), whose sum is σ = 466971336. Its totient is φ = 71841732.

The previous prime is 215525161. The next prime is 215525231. The reversal of 215525214 is 412525512.

It is a super-2 number, since 2×215525214² = 92902235739491592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5986794 + ... + 5986829.

It is an arithmetic number, because the mean of its divisors is an integer number (38914278).

Almost surely, 2^215525214 is an apocalyptic number.

215525214 is an abundant number, since it is smaller than the sum of its proper divisors (251446122).

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

215525214 is a wasteful number, since it uses less digits than its factorization.

215525214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11973631 (or 11973628 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 215525214 is about 14680.7770230325. Note that the first 3 decimals coincide. The cubic root of 215525214 is about 599.5600608347.

The spelling of 215525214 in words is "two hundred fifteen million, five hundred twenty-five thousand, two hundred fourteen".