31226544603561 has 4 divisors (see below), whose sum is σ = 41635392804752. Its totient is φ = 20817696402372.

The previous prime is 31226544603511. The next prime is 31226544603577. The reversal of 31226544603561 is 16530644562213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 31226544603561 - 2⁶ = 31226544603497 is a prime.

It is a super-2 number, since 2×31226544603561² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31226544603561.

It is not an unprimeable number, because it can be changed into a prime (31226544603511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5204424100591 + ... + 5204424100596.

It is an arithmetic number, because the mean of its divisors is an integer number (10408848201188).

Almost surely, 2^{31226544603561} is an apocalyptic number.

It is an amenable number.

31226544603561 is a deficient number, since it is larger than the sum of its proper divisors (10408848201191).

31226544603561 is a wasteful number, since it uses less digits than its factorization.

31226544603561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10408848201190.

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 31226544603561 in words is "thirty-one trillion, two hundred twenty-six billion, five hundred forty-four million, six hundred three thousand, five hundred sixty-one".