2221613956 has 9 divisors (see below), whose sum is σ = 3887989399. Its totient is φ = 1110759844.

The previous prime is 2221613951. The next prime is 2221613981. The reversal of 2221613956 is 6593161222.

The square root of 2221613956 is 47134.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221613951) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 82485 + ... + 106051.

Almost surely, 2^2221613956 is an apocalyptic number.

2221613956 is the 47134-th square number.

It is an amenable number.

2221613956 is a deficient number, since it is larger than the sum of its proper divisors (1666375443).

2221613956 is an frugal number, since it uses more digits than its factorization.

2221613956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47138 (or 23569 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The cubic root of 2221613956 is about 1304.8368054370.

The spelling of 2221613956 in words is "two billion, two hundred twenty-one million, six hundred thirteen thousand, nine hundred fifty-six".