215319397 has 8 divisors (see below), whose sum is σ = 222976512. Its totient is φ = 207706800.

The previous prime is 215319383. The next prime is 215319427. The reversal of 215319397 is 793913512.

215319397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215319397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215319197) 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, 1129 + ... + 20782.

It is an arithmetic number, because the mean of its divisors is an integer number (27872064).

Almost surely, 2^215319397 is an apocalyptic number.

It is an amenable number.

215319397 is a deficient number, since it is larger than the sum of its proper divisors (7657115).

215319397 is a wasteful number, since it uses less digits than its factorization.

215319397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22259.

The product of its digits is 51030, while the sum is 40.

The square root of 215319397 is about 14673.7656039614. The cubic root of 215319397 is about 599.3691489812.

The spelling of 215319397 in words is "two hundred fifteen million, three hundred nineteen thousand, three hundred ninety-seven".