22305997537 has 2 divisors, whose sum is σ = 22305997538. Its totient is φ = 22305997536.

The previous prime is 22305997531. The next prime is 22305997589. The reversal of 22305997537 is 73579950322.

It is an a-pointer prime, because the next prime (22305997589) can be obtained adding 22305997537 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19521957841 + 2784039696 = 139721^2 + 52764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22305997537 is a prime.

It is a super-2 number, since 2×22305997537² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22305997531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11152998768 + 11152998769.

It is an arithmetic number, because the mean of its divisors is an integer number (11152998769).

Almost surely, 2^22305997537 is an apocalyptic number.

It is an amenable number.

22305997537 is a deficient number, since it is larger than the sum of its proper divisors (1).

22305997537 is an equidigital number, since it uses as much as digits as its factorization.

22305997537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3572100, while the sum is 52.

The spelling of 22305997537 in words is "twenty-two billion, three hundred five million, nine hundred ninety-seven thousand, five hundred thirty-seven".