4181215897 has 4 divisors (see below), whose sum is σ = 4278453520. Its totient is φ = 4083978276.

The previous prime is 4181215859. The next prime is 4181215901. The reversal of 4181215897 is 7985121814.

4181215897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4181215897 - 2²³ = 4172827289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4181215847) 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, 48618747 + ... + 48618832.

It is an arithmetic number, because the mean of its divisors is an integer number (1069613380).

Almost surely, 2^4181215897 is an apocalyptic number.

It is an amenable number.

4181215897 is a deficient number, since it is larger than the sum of its proper divisors (97237623).

4181215897 is an equidigital number, since it uses as much as digits as its factorization.

4181215897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97237622.

The product of its digits is 161280, while the sum is 46.

The square root of 4181215897 is about 64662.3220817193. The cubic root of 4181215897 is about 1611.0197488885.

The spelling of 4181215897 in words is "four billion, one hundred eighty-one million, two hundred fifteen thousand, eight hundred ninety-seven".