4221729247 has 4 divisors (see below), whose sum is σ = 4293284040. Its totient is φ = 4150174456.

The previous prime is 4221729229. The next prime is 4221729283. The reversal of 4221729247 is 7429271224.

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-4221729247 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 (4221729217) 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, 35777308 + ... + 35777425.

It is an arithmetic number, because the mean of its divisors is an integer number (1073321010).

Almost surely, 2^4221729247 is an apocalyptic number.

4221729247 is a deficient number, since it is larger than the sum of its proper divisors (71554793).

4221729247 is an equidigital number, since it uses as much as digits as its factorization.

4221729247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71554792.

The product of its digits is 112896, while the sum is 40.

The square root of 4221729247 is about 64974.8354903650. The cubic root of 4221729247 is about 1616.2062890949.

The spelling of 4221729247 in words is "four billion, two hundred twenty-one million, seven hundred twenty-nine thousand, two hundred forty-seven".