215231362218949 has 2 divisors, whose sum is σ = 215231362218950. Its totient is φ = 215231362218948.

The previous prime is 215231362218907. The next prime is 215231362218953. The reversal of 215231362218949 is 949812263132512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211171612745025 + 4059749473924 = 14531745^2 + 2014882^2 .

It is a cyclic number.

It is not a de Polignac number, because 215231362218949 - 2¹¹ = 215231362216901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215231362218893 and 215231362218902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215231362218989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107615681109474 + 107615681109475.

It is an arithmetic number, because the mean of its divisors is an integer number (107615681109475).

Almost surely, 2^{215231362218949} is an apocalyptic number.

It is an amenable number.

215231362218949 is a deficient number, since it is larger than the sum of its proper divisors (1).

215231362218949 is an equidigital number, since it uses as much as digits as its factorization.

215231362218949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11197440, while the sum is 58.

The spelling of 215231362218949 in words is "two hundred fifteen trillion, two hundred thirty-one billion, three hundred sixty-two million, two hundred eighteen thousand, nine hundred forty-nine".