215097 has 4 divisors (see below), whose sum is σ = 286800. Its totient is φ = 143396.

The previous prime is 215087. The next prime is 215123. The reversal of 215097 is 790512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 215097 - 2¹⁶ = 149561 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (215077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35847 + ... + 35852.

It is an arithmetic number, because the mean of its divisors is an integer number (71700).

2²¹⁵⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

215097 is a deficient number, since it is larger than the sum of its proper divisors (71703).

215097 is an equidigital number, since it uses as much as digits as its factorization.

215097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71702.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 215097 is about 463.7855107698. The cubic root of 215097 is about 59.9162721039.

The spelling of 215097 in words is "two hundred fifteen thousand, ninety-seven".