8153215491 has 8 divisors (see below), whose sum is σ = 11024066304. Its totient is φ = 5358920840.

The previous prime is 8153215451. The next prime is 8153215493. The reversal of 8153215491 is 1945123518.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8153215491 - 2¹⁷ = 8153084419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8153215493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19138791 + ... + 19139216.

It is an arithmetic number, because the mean of its divisors is an integer number (1378008288).

Almost surely, 2^8153215491 is an apocalyptic number.

8153215491 is a deficient number, since it is larger than the sum of its proper divisors (2870850813).

8153215491 is a wasteful number, since it uses less digits than its factorization.

8153215491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38278081.

The product of its digits is 43200, while the sum is 39.

The square root of 8153215491 is about 90295.1576276380. The cubic root of 8153215491 is about 2012.6873035604.

The spelling of 8153215491 in words is "eight billion, one hundred fifty-three million, two hundred fifteen thousand, four hundred ninety-one".