31223505043525 has 24 divisors (see below), whose sum is σ = 39062697845184. Its totient is φ = 24755900601600.

The previous prime is 31223505043513. The next prime is 31223505043531. The reversal of 31223505043525 is 52534050532213.

It is not a de Polignac number, because 31223505043525 - 2⁹ = 31223505043013 is a prime.

It is a super-2 number, since 2×31223505043525² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37987962 + ... + 38801188.

It is an arithmetic number, because the mean of its divisors is an integer number (1627612410216).

Almost surely, 2^{31223505043525} is an apocalyptic number.

It is an amenable number.

31223505043525 is a deficient number, since it is larger than the sum of its proper divisors (7839192801659).

31223505043525 is a wasteful number, since it uses less digits than its factorization.

31223505043525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826941 (or 826936 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 40.

Adding to 31223505043525 its reverse (52534050532213), we get a palindrome (83757555575738).

The spelling of 31223505043525 in words is "thirty-one trillion, two hundred twenty-three billion, five hundred five million, forty-three thousand, five hundred twenty-five".