22615948997 has 8 divisors (see below), whose sum is σ = 23970335256. Its totient is φ = 21264233472.

The previous prime is 22615948973. The next prime is 22615949011. The reversal of 22615948997 is 79984951622.

It is a Cunningham number, because it is equal to 150386²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 9352050436 + 13263898561 = 96706^2 + 115169^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22615948997 - 2¹⁰ = 22615947973 is a prime.

It is a super-2 number, since 2×22615948997² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22615948097) 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 in 7 ways as a sum of consecutive naturals, for example, 650228 + ... + 684125.

It is an arithmetic number, because the mean of its divisors is an integer number (2996291907).

Almost surely, 2^22615948997 is an apocalyptic number.

It is an amenable number.

22615948997 is a deficient number, since it is larger than the sum of its proper divisors (1354386259).

22615948997 is a wasteful number, since it uses less digits than its factorization.

22615948997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335367.

The product of its digits is 19595520, while the sum is 62.

The spelling of 22615948997 in words is "twenty-two billion, six hundred fifteen million, nine hundred forty-eight thousand, nine hundred ninety-seven".