431220005 has 8 divisors (see below), whose sum is σ = 522588024. Its totient is φ = 341560000.

The previous prime is 431219993. The next prime is 431220019. The reversal of 431220005 is 500022134.

It can be written as a sum of positive squares in 4 ways, for example, as 133795489 + 297424516 = 11567^2 + 17246^2 .

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

It is not a de Polignac number, because 431220005 - 2⁴ = 431219989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426446 + ... + 427455.

It is an arithmetic number, because the mean of its divisors is an integer number (65323503).

Almost surely, 2^431220005 is an apocalyptic number.

It is an amenable number.

431220005 is a deficient number, since it is larger than the sum of its proper divisors (91368019).

431220005 is a wasteful number, since it uses less digits than its factorization.

431220005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854007.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 431220005 is about 20765.8374500043. The cubic root of 431220005 is about 755.4973872662.

Adding to 431220005 its reverse (500022134), we get a palindrome (931242139).

The spelling of 431220005 in words is "four hundred thirty-one million, two hundred twenty thousand, five".