1220500535 has 16 divisors (see below), whose sum is σ = 1521887232. Its totient is φ = 938628000.

The previous prime is 1220500513. The next prime is 1220500553. The reversal of 1220500535 is 5350050221.

It is not a de Polignac number, because 1220500535 - 2⁸ = 1220500279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220500535.

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, 2669 + ... + 49478.

It is an arithmetic number, because the mean of its divisors is an integer number (95117952).

Almost surely, 2^1220500535 is an apocalyptic number.

1220500535 is a deficient number, since it is larger than the sum of its proper divisors (301386697).

1220500535 is a wasteful number, since it uses less digits than its factorization.

1220500535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52334.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 1220500535 is about 34935.6627960598. The cubic root of 1220500535 is about 1068.6758403680.

Adding to 1220500535 its reverse (5350050221), we get a palindrome (6570550756).

The spelling of 1220500535 in words is "one billion, two hundred twenty million, five hundred thousand, five hundred thirty-five".