31245245543 has 4 divisors (see below), whose sum is σ = 31408833408. Its totient is φ = 31081657680.

The previous prime is 31245245527. The next prime is 31245245611. The reversal of 31245245543 is 34554254213.

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

It is a cyclic number.

It is not a de Polignac number, because 31245245543 - 2⁴ = 31245245527 is a prime.

It is a super-2 number, since 2×31245245543² (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 = 31245245497 and 31245245506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31245245513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81793646 + ... + 81794027.

It is an arithmetic number, because the mean of its divisors is an integer number (7852208352).

Almost surely, 2^31245245543 is an apocalyptic number.

31245245543 is a deficient number, since it is larger than the sum of its proper divisors (163587865).

31245245543 is a wasteful number, since it uses less digits than its factorization.

31245245543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163587864.

The product of its digits is 288000, while the sum is 38.

Adding to 31245245543 its reverse (34554254213), we get a palindrome (65799499756).

The spelling of 31245245543 in words is "thirty-one billion, two hundred forty-five million, two hundred forty-five thousand, five hundred forty-three".