231302354431 has 4 divisors (see below), whose sum is σ = 231327136432. Its totient is φ = 231277572432.

The previous prime is 231302354407. The next prime is 231302354471. The reversal of 231302354431 is 134453203132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231302354431 is a prime.

It is a super-2 number, since 2×231302354431² (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 = 231302354393 and 231302354402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231302354471) 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, 12376995 + ... + 12395668.

It is an arithmetic number, because the mean of its divisors is an integer number (57831784108).

Almost surely, 2^231302354431 is an apocalyptic number.

231302354431 is a deficient number, since it is larger than the sum of its proper divisors (24782001).

231302354431 is an equidigital number, since it uses as much as digits as its factorization.

231302354431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24782000.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 231302354431 its reverse (134453203132), we get a palindrome (365755557563).

The spelling of 231302354431 in words is "two hundred thirty-one billion, three hundred two million, three hundred fifty-four thousand, four hundred thirty-one".