22072631561 has 4 divisors (see below), whose sum is σ = 22079265300. Its totient is φ = 22065997824.

The previous prime is 22072631543. The next prime is 22072631579. The reversal of 22072631561 is 16513627022.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (22072631543) and next prime (22072631579).

It can be written as a sum of positive squares in 2 ways, for example, as 3974041600 + 18098589961 = 63040^2 + 134531^2 .

It is a cyclic number.

It is not a de Polignac number, because 22072631561 - 2¹⁰ = 22072630537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22072631261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3311876 + ... + 3318533.

It is an arithmetic number, because the mean of its divisors is an integer number (5519816325).

Almost surely, 2^22072631561 is an apocalyptic number.

It is an amenable number.

22072631561 is a deficient number, since it is larger than the sum of its proper divisors (6633739).

22072631561 is an equidigital number, since it uses as much as digits as its factorization.

22072631561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6633738.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 22072631561 in words is "twenty-two billion, seventy-two million, six hundred thirty-one thousand, five hundred sixty-one".