1222561515 has 24 divisors (see below), whose sum is σ = 2275462800. Its totient is φ = 558884928.

The previous prime is 1222561427. The next prime is 1222561541. The reversal of 1222561515 is 5151652221.

It is not a de Polignac number, because 1222561515 - 2⁷ = 1222561387 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 830940 + ... + 832409.

It is an arithmetic number, because the mean of its divisors is an integer number (94810950).

Almost surely, 2^1222561515 is an apocalyptic number.

1222561515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1222561515 is a deficient number, since it is larger than the sum of its proper divisors (1052901285).

1222561515 is a wasteful number, since it uses less digits than its factorization.

1222561515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663371 (or 1663364 counting only the distinct ones).

The product of its digits is 6000, while the sum is 30.

The square root of 1222561515 is about 34965.1471468375. The cubic root of 1222561515 is about 1069.2770365935.

The spelling of 1222561515 in words is "one billion, two hundred twenty-two million, five hundred sixty-one thousand, five hundred fifteen".