4215861479 has 4 divisors (see below), whose sum is σ = 4234433784. Its totient is φ = 4197289176.

The previous prime is 4215861473. The next prime is 4215861491. The reversal of 4215861479 is 9741685124.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4215861479 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 (4215861473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9285812 + ... + 9286265.

It is an arithmetic number, because the mean of its divisors is an integer number (1058608446).

Almost surely, 2^4215861479 is an apocalyptic number.

4215861479 is a deficient number, since it is larger than the sum of its proper divisors (18572305).

4215861479 is a wasteful number, since it uses less digits than its factorization.

4215861479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18572304.

The product of its digits is 483840, while the sum is 47.

The square root of 4215861479 is about 64929.6656313584. The cubic root of 4215861479 is about 1615.4571552612.

The spelling of 4215861479 in words is "four billion, two hundred fifteen million, eight hundred sixty-one thousand, four hundred seventy-nine".