215335397 has 2 divisors, whose sum is σ = 215335398. Its totient is φ = 215335396.

The previous prime is 215335363. The next prime is 215335409. The reversal of 215335397 is 793533512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164198596 + 51136801 = 12814^2 + 7151^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215335397 is a prime.

It is a super-2 number, since 2×215335397² = 92738666402295218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 215335397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215335097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107667698 + 107667699.

It is an arithmetic number, because the mean of its divisors is an integer number (107667699).

Almost surely, 2^215335397 is an apocalyptic number.

It is an amenable number.

215335397 is a deficient number, since it is larger than the sum of its proper divisors (1).

215335397 is an equidigital number, since it uses as much as digits as its factorization.

215335397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85050, while the sum is 38.

The square root of 215335397 is about 14674.3107844968. The cubic root of 215335397 is about 599.3839946306.

The spelling of 215335397 in words is "two hundred fifteen million, three hundred thirty-five thousand, three hundred ninety-seven".