431500121323 has 16 divisors (see below), whose sum is σ = 446764370976. Its totient is φ = 416465141760.

The previous prime is 431500121303. The next prime is 431500121363. The reversal of 431500121323 is 323121005134.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431500121323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431500121303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10291440 + ... + 10333282.

It is an arithmetic number, because the mean of its divisors is an integer number (27922773186).

Almost surely, 2^431500121323 is an apocalyptic number.

431500121323 is a deficient number, since it is larger than the sum of its proper divisors (15264249653).

431500121323 is a wasteful number, since it uses less digits than its factorization.

431500121323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44574.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 431500121323 its reverse (323121005134), we get a palindrome (754621126457).

The spelling of 431500121323 in words is "four hundred thirty-one billion, five hundred million, one hundred twenty-one thousand, three hundred twenty-three".