1215545214259 has 2 divisors, whose sum is σ = 1215545214260. Its totient is φ = 1215545214258.

The previous prime is 1215545214139. The next prime is 1215545214269. The reversal of 1215545214259 is 9524125455121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1215545214259 - 2⁷ = 1215545214131 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215545214269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607772607129 + 607772607130.

It is an arithmetic number, because the mean of its divisors is an integer number (607772607130).

Almost surely, 2^{1215545214259} is an apocalyptic number.

1215545214259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215545214259 is an equidigital number, since it uses as much as digits as its factorization.

1215545214259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720000, while the sum is 46.

It can be divided in two parts, 12155452 and 14259, that added together give a triangular number (12169711 = T₄₉₃₃).

The spelling of 1215545214259 in words is "one trillion, two hundred fifteen billion, five hundred forty-five million, two hundred fourteen thousand, two hundred fifty-nine".