1215395240231 has 2 divisors, whose sum is σ = 1215395240232. Its totient is φ = 1215395240230.

The previous prime is 1215395240219. The next prime is 1215395240239. The reversal of 1215395240231 is 1320425935121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1215395240231 - 2⁶ = 1215395240167 is a prime.

It is a super-2 number, since 2×1215395240231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215395240239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607697620115 + 607697620116.

It is an arithmetic number, because the mean of its divisors is an integer number (607697620116).

Almost surely, 2^{1215395240231} is an apocalyptic number.

1215395240231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215395240231 is an equidigital number, since it uses as much as digits as its factorization.

1215395240231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 1215395240231 in words is "one trillion, two hundred fifteen billion, three hundred ninety-five million, two hundred forty thousand, two hundred thirty-one".