31224426361 has 4 divisors (see below), whose sum is σ = 31279302900. Its totient is φ = 31169549824.

The previous prime is 31224426313. The next prime is 31224426367. The reversal of 31224426361 is 16362442213.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16681272336 + 14543154025 = 129156^2 + 120595^2 .

It is a cyclic number.

It is not a de Polignac number, because 31224426361 - 2⁹ = 31224425849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31224426367) 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, 27437416 + ... + 27438553.

It is an arithmetic number, because the mean of its divisors is an integer number (7819825725).

Almost surely, 2^31224426361 is an apocalyptic number.

It is an amenable number.

31224426361 is a deficient number, since it is larger than the sum of its proper divisors (54876539).

31224426361 is an equidigital number, since it uses as much as digits as its factorization.

31224426361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54876538.

The product of its digits is 41472, while the sum is 34.

Adding to 31224426361 its reverse (16362442213), we get a palindrome (47586868574).

The spelling of 31224426361 in words is "thirty-one billion, two hundred twenty-four million, four hundred twenty-six thousand, three hundred sixty-one".