215297229989 has 2 divisors, whose sum is σ = 215297229990. Its totient is φ = 215297229988.

The previous prime is 215297229947. The next prime is 215297230033. The reversal of 215297229989 is 989922792512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207343622500 + 7953607489 = 455350^2 + 89183^2 .

It is a cyclic number.

It is not a de Polignac number, because 215297229989 - 2²⁴ = 215280452773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215297229689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107648614994 + 107648614995.

It is an arithmetic number, because the mean of its divisors is an integer number (107648614995).

Almost surely, 2^215297229989 is an apocalyptic number.

It is an amenable number.

215297229989 is a deficient number, since it is larger than the sum of its proper divisors (1).

215297229989 is an equidigital number, since it uses as much as digits as its factorization.

215297229989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29393280, while the sum is 65.

The spelling of 215297229989 in words is "two hundred fifteen billion, two hundred ninety-seven million, two hundred twenty-nine thousand, nine hundred eighty-nine".