31221400434325 has 24 divisors (see below), whose sum is σ = 41015849047560. Its totient is φ = 23494122086400.

The previous prime is 31221400434311. The next prime is 31221400434347. The reversal of 31221400434325 is 52343400412213.

It can be written as a sum of positive squares in 12 ways, for example, as 11610470167396 + 19610930266929 = 3407414^2 + 4428423^2 .

It is not a de Polignac number, because 31221400434325 - 2⁵ = 31221400434293 is a prime.

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, 20766396 + ... + 22219045.

It is an arithmetic number, because the mean of its divisors is an integer number (1708993710315).

Almost surely, 2^{31221400434325} is an apocalyptic number.

It is an amenable number.

31221400434325 is a deficient number, since it is larger than the sum of its proper divisors (9794448613235).

31221400434325 is a wasteful number, since it uses less digits than its factorization.

31221400434325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42987177 (or 42987172 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 31221400434325 its reverse (52343400412213), we get a palindrome (83564800846538).

The spelling of 31221400434325 in words is "thirty-one trillion, two hundred twenty-one billion, four hundred million, four hundred thirty-four thousand, three hundred twenty-five".