1222146256515 has 64 divisors (see below), whose sum is σ = 2075081932800. Its totient is φ = 612493830144.

The previous prime is 1222146256511. The next prime is 1222146256531. The reversal of 1222146256515 is 5156526412221.

It is not a de Polignac number, because 1222146256515 - 2² = 1222146256511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222146256511) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 49926319 + ... + 49950791.

It is an arithmetic number, because the mean of its divisors is an integer number (32423155200).

Almost surely, 2^{1222146256515} is an apocalyptic number.

1222146256515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1222146256515 is a deficient number, since it is larger than the sum of its proper divisors (852935676285).

1222146256515 is a wasteful number, since it uses less digits than its factorization.

1222146256515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25916.

The product of its digits is 288000, while the sum is 42.

The spelling of 1222146256515 in words is "one trillion, two hundred twenty-two billion, one hundred forty-six million, two hundred fifty-six thousand, five hundred fifteen".