215453117 has 8 divisors (see below), whose sum is σ = 235306560. Its totient is φ = 195644160.

The previous prime is 215453113. The next prime is 215453137. The reversal of 215453117 is 711354512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215453117 - 2² = 215453113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215453117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215453111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548 + ... + 20765.

It is an arithmetic number, because the mean of its divisors is an integer number (29413320).

Almost surely, 2^215453117 is an apocalyptic number.

It is an amenable number.

215453117 is a deficient number, since it is larger than the sum of its proper divisors (19853443).

215453117 is a wasteful number, since it uses less digits than its factorization.

215453117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22243.

The product of its digits is 4200, while the sum is 29.

The square root of 215453117 is about 14678.3213277268. The cubic root of 215453117 is about 599.4931988934.

The spelling of 215453117 in words is "two hundred fifteen million, four hundred fifty-three thousand, one hundred seventeen".