1220453515 has 16 divisors (see below), whose sum is σ = 1482465600. Its totient is φ = 964454400.

The previous prime is 1220453513. The next prime is 1220453537. The reversal of 1220453515 is 5153540221.

It is not a de Polignac number, because 1220453515 - 2¹ = 1220453513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220453513) 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, 288415 + ... + 292615.

It is an arithmetic number, because the mean of its divisors is an integer number (92654100).

Almost surely, 2^1220453515 is an apocalyptic number.

1220453515 is a deficient number, since it is larger than the sum of its proper divisors (262012085).

1220453515 is an equidigital number, since it uses as much as digits as its factorization.

1220453515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4902.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1220453515 is about 34934.9898382696. The cubic root of 1220453515 is about 1068.6621165495.

Adding to 1220453515 its reverse (5153540221), we get a palindrome (6373993736).

The spelling of 1220453515 in words is "one billion, two hundred twenty million, four hundred fifty-three thousand, five hundred fifteen".