464215721 has 8 divisors (see below), whose sum is σ = 467121600. Its totient is φ = 461319120.

The previous prime is 464215709. The next prime is 464215729. The reversal of 464215721 is 127512464.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-464215721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (464215729) 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, 116126 + ... + 120056.

It is an arithmetic number, because the mean of its divisors is an integer number (58390200).

Almost surely, 2^464215721 is an apocalyptic number.

It is an amenable number.

464215721 is a deficient number, since it is larger than the sum of its proper divisors (2905879).

464215721 is a wasteful number, since it uses less digits than its factorization.

464215721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4639.

The product of its digits is 13440, while the sum is 32.

The square root of 464215721 is about 21545.6659446860. The cubic root of 464215721 is about 774.2952850231.

The spelling of 464215721 in words is "four hundred sixty-four million, two hundred fifteen thousand, seven hundred twenty-one".