405221799 has 8 divisors (see below), whose sum is σ = 540403840. Its totient is φ = 270093816.

The previous prime is 405221783. The next prime is 405221807. The reversal of 405221799 is 997122504.

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

It is not a de Polignac number, because 405221799 - 2⁴ = 405221783 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 (405221699) 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, 9654 + ... + 30060.

It is an arithmetic number, because the mean of its divisors is an integer number (67550480).

Almost surely, 2^405221799 is an apocalyptic number.

405221799 is a deficient number, since it is larger than the sum of its proper divisors (135182041).

405221799 is a wasteful number, since it uses less digits than its factorization.

405221799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27029.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 405221799 is about 20130.1216836859. The cubic root of 405221799 is about 739.9986602118.

The spelling of 405221799 in words is "four hundred five million, two hundred twenty-one thousand, seven hundred ninety-nine".