1220500571 has 4 divisors (see below), whose sum is σ = 1228692000. Its totient is φ = 1212309144.

The previous prime is 1220500553. The next prime is 1220500591. The reversal of 1220500571 is 1750050221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220500571 - 2⁶ = 1220500507 is a prime.

It is a super-2 number, since 2×1220500571² = 2979243287622652082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220500591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4095491 + ... + 4095788.

It is an arithmetic number, because the mean of its divisors is an integer number (307173000).

Almost surely, 2^1220500571 is an apocalyptic number.

1220500571 is a deficient number, since it is larger than the sum of its proper divisors (8191429).

1220500571 is an equidigital number, since it uses as much as digits as its factorization.

1220500571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8191428.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 1220500571 is about 34935.6633112927. The cubic root of 1220500571 is about 1068.6758508752.

Adding to 1220500571 its reverse (1750050221), we get a palindrome (2970550792).

The spelling of 1220500571 in words is "one billion, two hundred twenty million, five hundred thousand, five hundred seventy-one".