1215401025255 has 16 divisors (see below), whose sum is σ = 1966491548640. Its totient is φ = 640930577408.

The previous prime is 1215401025197. The next prime is 1215401025257. The reversal of 1215401025255 is 5525201045121.

It is a cyclic number.

It is not a de Polignac number, because 1215401025255 - 2¹⁰ = 1215401024231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215401025257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455205042 + ... + 455207711.

It is an arithmetic number, because the mean of its divisors is an integer number (122905721790).

Almost surely, 2^{1215401025255} is an apocalyptic number.

1215401025255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1215401025255 is a deficient number, since it is larger than the sum of its proper divisors (751090523385).

1215401025255 is an equidigital number, since it uses as much as digits as its factorization.

1215401025255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910412850.

The product of its (nonzero) digits is 20000, while the sum is 33.

The spelling of 1215401025255 in words is "one trillion, two hundred fifteen billion, four hundred one million, twenty-five thousand, two hundred fifty-five".