8237345221 has 4 divisors (see below), whose sum is σ = 9414108832. Its totient is φ = 7060581612.

The previous prime is 8237345197. The next prime is 8237345231. The reversal of 8237345221 is 1225437328.

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 not a de Polignac number, because 8237345221 - 2²³ = 8228956613 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 (8237345231) 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, 588381795 + ... + 588381808.

It is an arithmetic number, because the mean of its divisors is an integer number (2353527208).

Almost surely, 2^8237345221 is an apocalyptic number.

It is an amenable number.

8237345221 is a deficient number, since it is larger than the sum of its proper divisors (1176763611).

8237345221 is a wasteful number, since it uses less digits than its factorization.

8237345221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176763610.

The product of its digits is 80640, while the sum is 37.

The square root of 8237345221 is about 90759.8216227864. The cubic root of 8237345221 is about 2019.5863301038.

The spelling of 8237345221 in words is "eight billion, two hundred thirty-seven million, three hundred forty-five thousand, two hundred twenty-one".