22312520521 has 2 divisors, whose sum is σ = 22312520522. Its totient is φ = 22312520520.

The previous prime is 22312520473. The next prime is 22312520533. The reversal of 22312520521 is 12502521322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21548772025 + 763748496 = 146795^2 + 27636^2 .

It is a cyclic number.

It is not a de Polignac number, because 22312520521 - 2¹³ = 22312512329 is a prime.

It is a super-3 number, since 3×22312520521³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (22312526521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11156260260 + 11156260261.

It is an arithmetic number, because the mean of its divisors is an integer number (11156260261).

Almost surely, 2^22312520521 is an apocalyptic number.

It is an amenable number.

22312520521 is a deficient number, since it is larger than the sum of its proper divisors (1).

22312520521 is an equidigital number, since it uses as much as digits as its factorization.

22312520521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 22312520521 in words is "twenty-two billion, three hundred twelve million, five hundred twenty thousand, five hundred twenty-one".