22705631 has 4 divisors (see below), whose sum is σ = 24452232. Its totient is φ = 20959032.

The previous prime is 22705597. The next prime is 22705649. The reversal of 22705631 is 13650722.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22705631 is a prime.

It is a super-2 number, since 2×22705631² = 1031091358216322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22705631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22705651) 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 3 ways as a sum of consecutive naturals, for example, 873281 + ... + 873306.

It is an arithmetic number, because the mean of its divisors is an integer number (6113058).

Almost surely, 2^22705631 is an apocalyptic number.

22705631 is a deficient number, since it is larger than the sum of its proper divisors (1746601).

22705631 is a wasteful number, since it uses less digits than its factorization.

22705631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746600.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 22705631 is about 4765.0426021181. The cubic root of 22705631 is about 283.1682293764.

The spelling of 22705631 in words is "twenty-two million, seven hundred five thousand, six hundred thirty-one".