231403431431 has 4 divisors (see below), whose sum is σ = 231412212864. Its totient is φ = 231394650000.

The previous prime is 231403431419. The next prime is 231403431439. The reversal of 231403431431 is 134134304132.

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 231403431431 - 2¹⁰ = 231403430407 is a prime.

It is a super-2 number, since 2×231403431431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231403431394 and 231403431403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231403431439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4351070 + ... + 4403931.

It is an arithmetic number, because the mean of its divisors is an integer number (57853053216).

Almost surely, 2^231403431431 is an apocalyptic number.

231403431431 is a deficient number, since it is larger than the sum of its proper divisors (8781433).

231403431431 is an equidigital number, since it uses as much as digits as its factorization.

231403431431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8781432.

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

Adding to 231403431431 its reverse (134134304132), we get a palindrome (365537735563).

The spelling of 231403431431 in words is "two hundred thirty-one billion, four hundred three million, four hundred thirty-one thousand, four hundred thirty-one".