1251155412215 has 8 divisors (see below), whose sum is σ = 1504601457840. Its totient is φ = 998781020992.

The previous prime is 1251155412191. The next prime is 1251155412251. The reversal of 1251155412215 is 5122145511521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1251155412215 - 2³⁰ = 1250081670391 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267911030 + ... + 267915699.

It is an arithmetic number, because the mean of its divisors is an integer number (188075182230).

Almost surely, 2^{1251155412215} is an apocalyptic number.

1251155412215 is a deficient number, since it is larger than the sum of its proper divisors (253446045625).

1251155412215 is an equidigital number, since it uses as much as digits as its factorization.

1251155412215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535827201.

The product of its digits is 20000, while the sum is 35.

The spelling of 1251155412215 in words is "one trillion, two hundred fifty-one billion, one hundred fifty-five million, four hundred twelve thousand, two hundred fifteen".