2263622721 has 4 divisors (see below), whose sum is σ = 3018163632. Its totient is φ = 1509081812.

The previous prime is 2263622719. The next prime is 2263622747. The reversal of 2263622721 is 1272263622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2263622721 - 2¹ = 2263622719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2263622701) 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, 377270451 + ... + 377270456.

It is an arithmetic number, because the mean of its divisors is an integer number (754540908).

Almost surely, 2^2263622721 is an apocalyptic number.

It is an amenable number.

2263622721 is a deficient number, since it is larger than the sum of its proper divisors (754540911).

2263622721 is an equidigital number, since it uses as much as digits as its factorization.

2263622721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754540910.

The product of its digits is 24192, while the sum is 33.

The square root of 2263622721 is about 47577.5442935005. The cubic root of 2263622721 is about 1313.0099428722.

The spelling of 2263622721 in words is "two billion, two hundred sixty-three million, six hundred twenty-two thousand, seven hundred twenty-one".