2237266721 has 8 divisors (see below), whose sum is σ = 2299169544. Its totient is φ = 2175713280.

The previous prime is 2237266709. The next prime is 2237266723. The reversal of 2237266721 is 1276627322.

2237266721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6027025 + 2231239696 = 2455^2 + 47236^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2237266721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2237266723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74336 + ... + 100001.

It is an arithmetic number, because the mean of its divisors is an integer number (287396193).

Almost surely, 2^2237266721 is an apocalyptic number.

It is an amenable number.

2237266721 is a deficient number, since it is larger than the sum of its proper divisors (61902823).

2237266721 is a wasteful number, since it uses less digits than its factorization.

2237266721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174691.

The product of its digits is 84672, while the sum is 38.

The square root of 2237266721 is about 47299.7539211358. The cubic root of 2237266721 is about 1307.8941207506.

The spelling of 2237266721 in words is "two billion, two hundred thirty-seven million, two hundred sixty-six thousand, seven hundred twenty-one".