2236645621 has 12 divisors (see below), whose sum is σ = 2638461600. Its totient is φ = 1890120120.

The previous prime is 2236645601. The next prime is 2236645627. The reversal of 2236645621 is 1265466322.

It is not a de Polignac number, because 2236645621 - 2⁵ = 2236645589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2236645627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 317971 + ... + 324928.

It is an arithmetic number, because the mean of its divisors is an integer number (219871800).

Almost surely, 2^2236645621 is an apocalyptic number.

It is an amenable number.

2236645621 is a deficient number, since it is larger than the sum of its proper divisors (401815979).

2236645621 is an equidigital number, since it uses as much as digits as its factorization.

2236645621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642984 (or 642977 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

The square root of 2236645621 is about 47293.1878921267. The cubic root of 2236645621 is about 1307.7730789731.

The spelling of 2236645621 in words is "two billion, two hundred thirty-six million, six hundred forty-five thousand, six hundred twenty-one".