8215047157 has 4 divisors (see below), whose sum is σ = 8647418080. Its totient is φ = 7782676236.

The previous prime is 8215047143. The next prime is 8215047161. The reversal of 8215047157 is 7517405128.

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 a cyclic number.

It is not a de Polignac number, because 8215047157 - 2¹¹ = 8215045109 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 (8215047167) 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, 216185433 + ... + 216185470.

It is an arithmetic number, because the mean of its divisors is an integer number (2161854520).

Almost surely, 2^8215047157 is an apocalyptic number.

It is an amenable number.

8215047157 is a deficient number, since it is larger than the sum of its proper divisors (432370923).

8215047157 is a wasteful number, since it uses less digits than its factorization.

8215047157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432370922.

The product of its (nonzero) digits is 78400, while the sum is 40.

The square root of 8215047157 is about 90636.8973266407. The cubic root of 8215047157 is about 2017.7623783684.

The spelling of 8215047157 in words is "eight billion, two hundred fifteen million, forty-seven thousand, one hundred fifty-seven".