31223067725 has 6 divisors (see below), whose sum is σ = 38716604010. Its totient is φ = 24978454160.

The previous prime is 31223067721. The next prime is 31223067749. The reversal of 31223067725 is 52776032213.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 672572356 + 30550495369 = 25934^2 + 174787^2 .

It is not a de Polignac number, because 31223067725 - 2² = 31223067721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223067721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 624461330 + ... + 624461379.

It is an arithmetic number, because the mean of its divisors is an integer number (6452767335).

Almost surely, 2^31223067725 is an apocalyptic number.

It is an amenable number.

31223067725 is a deficient number, since it is larger than the sum of its proper divisors (7493536285).

31223067725 is a wasteful number, since it uses less digits than its factorization.

31223067725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248922719 (or 1248922714 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 38.

Adding to 31223067725 its reverse (52776032213), we get a palindrome (83999099938).

The spelling of 31223067725 in words is "thirty-one billion, two hundred twenty-three million, sixty-seven thousand, seven hundred twenty-five".