405222131 has 4 divisors (see below), whose sum is σ = 405418200. Its totient is φ = 405026064.

The previous prime is 405222127. The next prime is 405222143. The reversal of 405222131 is 131222504.

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

It is a cyclic number.

It is not a de Polignac number, because 405222131 - 2² = 405222127 is a prime.

It is a super-2 number, since 2×405222131² = 328409950904362322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405222121) 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, 94901 + ... + 99078.

It is an arithmetic number, because the mean of its divisors is an integer number (101354550).

Almost surely, 2^405222131 is an apocalyptic number.

405222131 is a deficient number, since it is larger than the sum of its proper divisors (196069).

405222131 is a wasteful number, since it uses less digits than its factorization.

405222131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196068.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 405222131 is about 20130.1299300327. The cubic root of 405222131 is about 739.9988623065.

Adding to 405222131 its reverse (131222504), we get a palindrome (536444635).

The spelling of 405222131 in words is "four hundred five million, two hundred twenty-two thousand, one hundred thirty-one".