431771520225 has 24 divisors (see below), whose sum is σ = 713942429760. Its totient is φ = 230252278720.

The previous prime is 431771520211. The next prime is 431771520251. The reversal of 431771520225 is 522025177134.

It is not a de Polignac number, because 431771520225 - 2⁸ = 431771519969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 358372 + ... + 995978.

It is an arithmetic number, because the mean of its divisors is an integer number (29747601240).

Almost surely, 2^431771520225 is an apocalyptic number.

It is an amenable number.

431771520225 is a deficient number, since it is larger than the sum of its proper divisors (282170909535).

431771520225 is a wasteful number, since it uses less digits than its factorization.

431771520225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646649 (or 646644 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 39.

Adding to 431771520225 its reverse (522025177134), we get a palindrome (953796697359).

The spelling of 431771520225 in words is "four hundred thirty-one billion, seven hundred seventy-one million, five hundred twenty thousand, two hundred twenty-five".