8213157239 has 16 divisors (see below), whose sum is σ = 9797744640. Its totient is φ = 6731588160.

The previous prime is 8213157203. The next prime is 8213157257. The reversal of 8213157239 is 9327513128.

It is a cyclic number.

It is not a de Polignac number, because 8213157239 - 2⁸ = 8213156983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8213157196 and 8213157205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8213157299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 655667 + ... + 668075.

It is an arithmetic number, because the mean of its divisors is an integer number (612359040).

Almost surely, 2^8213157239 is an apocalyptic number.

8213157239 is a deficient number, since it is larger than the sum of its proper divisors (1584587401).

8213157239 is a wasteful number, since it uses less digits than its factorization.

8213157239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16550.

The product of its digits is 90720, while the sum is 41.

The square root of 8213157239 is about 90626.4709618553. The cubic root of 8213157239 is about 2017.6076339571.

The spelling of 8213157239 in words is "eight billion, two hundred thirteen million, one hundred fifty-seven thousand, two hundred thirty-nine".