215566253 has 16 divisors (see below), whose sum is σ = 251400576. Its totient is φ = 181016640.

The previous prime is 215566249. The next prime is 215566259. The reversal of 215566253 is 352665512.

It is not a de Polignac number, because 215566253 - 2² = 215566249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215566259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124250 + ... + 125972.

It is an arithmetic number, because the mean of its divisors is an integer number (15712536).

Almost surely, 2^215566253 is an apocalyptic number.

It is an amenable number.

215566253 is a deficient number, since it is larger than the sum of its proper divisors (35834323).

215566253 is a wasteful number, since it uses less digits than its factorization.

215566253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084.

The product of its digits is 54000, while the sum is 35.

The square root of 215566253 is about 14682.1746686245. The cubic root of 215566253 is about 599.5981132793.

The spelling of 215566253 in words is "two hundred fifteen million, five hundred sixty-six thousand, two hundred fifty-three".