215223040997 has 2 divisors, whose sum is σ = 215223040998. Its totient is φ = 215223040996.

The previous prime is 215223040979. The next prime is 215223041023. The reversal of 215223040997 is 799040322512.

Together with previous prime (215223040979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131309117956 + 83913923041 = 362366^2 + 289679^2 .

It is a cyclic number.

It is not a de Polignac number, because 215223040997 - 2⁶ = 215223040933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215223040397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107611520498 + 107611520499.

It is an arithmetic number, because the mean of its divisors is an integer number (107611520499).

Almost surely, 2^215223040997 is an apocalyptic number.

It is an amenable number.

215223040997 is a deficient number, since it is larger than the sum of its proper divisors (1).

215223040997 is an equidigital number, since it uses as much as digits as its factorization.

215223040997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 215223040997 in words is "two hundred fifteen billion, two hundred twenty-three million, forty thousand, nine hundred ninety-seven".