405420215 has 8 divisors (see below), whose sum is σ = 486775248. Its totient is φ = 324155520.

The previous prime is 405420193. The next prime is 405420217. The reversal of 405420215 is 512024504.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-405420215 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 (405420217) 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, 12281 + ... + 31010.

It is an arithmetic number, because the mean of its divisors is an integer number (60846906).

Almost surely, 2^405420215 is an apocalyptic number.

405420215 is a deficient number, since it is larger than the sum of its proper divisors (81355033).

405420215 is a wasteful number, since it uses less digits than its factorization.

405420215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45169.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 405420215 is about 20135.0494163784. The cubic root of 405420215 is about 740.1194200989.

Adding to 405420215 its reverse (512024504), we get a palindrome (917444719).

The spelling of 405420215 in words is "four hundred five million, four hundred twenty thousand, two hundred fifteen".