31224230431 has 8 divisors (see below), whose sum is σ = 32962337280. Its totient is φ = 29495596248.

The previous prime is 31224230381. The next prime is 31224230447. The reversal of 31224230431 is 13403242213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31224230431 - 2²¹ = 31222133279 is a prime.

It is a super-2 number, since 2×31224230431² (a number of 22 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 = 31224230396 and 31224230405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31224230461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2361391 + ... + 2374576.

It is an arithmetic number, because the mean of its divisors is an integer number (4120292160).

Almost surely, 2^31224230431 is an apocalyptic number.

31224230431 is a deficient number, since it is larger than the sum of its proper divisors (1738106849).

31224230431 is a wasteful number, since it uses less digits than its factorization.

31224230431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4736333.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31224230431 its reverse (13403242213), we get a palindrome (44627472644).

The spelling of 31224230431 in words is "thirty-one billion, two hundred twenty-four million, two hundred thirty thousand, four hundred thirty-one".