2221491265 has 32 divisors (see below), whose sum is σ = 3090721536. Its totient is φ = 1501347840.

The previous prime is 2221491257. The next prime is 2221491277. The reversal of 2221491265 is 5621941222.

It is a happy number.

It is not a de Polignac number, because 2221491265 - 2³ = 2221491257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2221491265.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1861509 + ... + 1862701.

It is an arithmetic number, because the mean of its divisors is an integer number (96585048).

Almost surely, 2^2221491265 is an apocalyptic number.

It is an amenable number.

2221491265 is a deficient number, since it is larger than the sum of its proper divisors (869230271).

2221491265 is a wasteful number, since it uses less digits than its factorization.

2221491265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929.

The product of its digits is 17280, while the sum is 34.

The square root of 2221491265 is about 47132.6984693217. The cubic root of 2221491265 is about 1304.8127846601.

The spelling of 2221491265 in words is "two billion, two hundred twenty-one million, four hundred ninety-one thousand, two hundred sixty-five".