1220550151515 has 16 divisors (see below), whose sum is σ = 1952950791168. Its totient is φ = 650936564576.

The previous prime is 1220550151489. The next prime is 1220550151537. The reversal of 1220550151515 is 5151510550221.

It is a cyclic number.

It is not a de Polignac number, because 1220550151515 - 2⁶ = 1220550151451 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1036587 + ... + 1874996.

It is an arithmetic number, because the mean of its divisors is an integer number (122059424448).

Almost surely, 2^{1220550151515} is an apocalyptic number.

1220550151515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1220550151515 is a deficient number, since it is larger than the sum of its proper divisors (732400639653).

1220550151515 is a wasteful number, since it uses less digits than its factorization.

1220550151515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2939538.

The product of its (nonzero) digits is 12500, while the sum is 33.

The spelling of 1220550151515 in words is "one trillion, two hundred twenty billion, five hundred fifty million, one hundred fifty-one thousand, five hundred fifteen".