431421331403 has 4 divisors (see below), whose sum is σ = 431500773648. Its totient is φ = 431341889160.

The previous prime is 431421331387. The next prime is 431421331447. The reversal of 431421331403 is 304133124134.

It is a happy number.

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 431421331403 - 2⁴ = 431421331387 is a prime.

It is a super-2 number, since 2×431421331403² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431421331303) 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, 39712976 + ... + 39723837.

It is an arithmetic number, because the mean of its divisors is an integer number (107875193412).

Almost surely, 2^431421331403 is an apocalyptic number.

431421331403 is a deficient number, since it is larger than the sum of its proper divisors (79442245).

431421331403 is an equidigital number, since it uses as much as digits as its factorization.

431421331403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79442244.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 431421331403 its reverse (304133124134), we get a palindrome (735554455537).

The spelling of 431421331403 in words is "four hundred thirty-one billion, four hundred twenty-one million, three hundred thirty-one thousand, four hundred three".