8209157315 has 4 divisors (see below), whose sum is σ = 9850988784. Its totient is φ = 6567325848.

The previous prime is 8209157311. The next prime is 8209157321. The reversal of 8209157315 is 5137519028.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8209157315 - 2² = 8209157311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8209157311) 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, 820915727 + ... + 820915736.

It is an arithmetic number, because the mean of its divisors is an integer number (2462747196).

Almost surely, 2^8209157315 is an apocalyptic number.

8209157315 is a deficient number, since it is larger than the sum of its proper divisors (1641831469).

8209157315 is a wasteful number, since it uses less digits than its factorization.

8209157315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641831468.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 8209157315 is about 90604.4000863093. The cubic root of 8209157315 is about 2017.2800462654.

The spelling of 8209157315 in words is "eight billion, two hundred nine million, one hundred fifty-seven thousand, three hundred fifteen".