1220500015 has 16 divisors (see below), whose sum is σ = 1675717632. Its totient is φ = 835969824.

The previous prime is 1220500009. The next prime is 1220500033. The reversal of 1220500015 is 5100050221.

It is a cyclic number.

It is not a de Polignac number, because 1220500015 - 2³ = 1220500007 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 12522 + ... + 50968.

It is an arithmetic number, because the mean of its divisors is an integer number (104732352).

Almost surely, 2^1220500015 is an apocalyptic number.

1220500015 is a deficient number, since it is larger than the sum of its proper divisors (455217617).

1220500015 is an equidigital number, since it uses as much as digits as its factorization.

1220500015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39366.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1220500015 is about 34935.6553538072. The cubic root of 1220500015 is about 1068.6756885965.

Adding to 1220500015 its reverse (5100050221), we get a palindrome (6320550236).

The spelling of 1220500015 in words is "one billion, two hundred twenty million, five hundred thousand, fifteen".