431131620332221 has 8 divisors (see below), whose sum is σ = 431174564766720. Its totient is φ = 431088677716272.

The previous prime is 431131620332051. The next prime is 431131620332249. The reversal of 431131620332221 is 122233026131134.

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

It is a cyclic number.

It is not a de Polignac number, because 431131620332221 - 2⁴³ = 422335527310013 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 (431131620332261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500933100 + ... + 501793018.

It is an arithmetic number, because the mean of its divisors is an integer number (53896820595840).

Almost surely, 2^{431131620332221} is an apocalyptic number.

It is an amenable number.

431131620332221 is a deficient number, since it is larger than the sum of its proper divisors (42944434499).

431131620332221 is a wasteful number, since it uses less digits than its factorization.

431131620332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909275.

The product of its (nonzero) digits is 31104, while the sum is 34.

Adding to 431131620332221 its reverse (122233026131134), we get a palindrome (553364646463355).

The spelling of 431131620332221 in words is "four hundred thirty-one trillion, one hundred thirty-one billion, six hundred twenty million, three hundred thirty-two thousand, two hundred twenty-one".