22678256281 has 4 divisors (see below), whose sum is σ = 22678574464. Its totient is φ = 22677938100.

The previous prime is 22678256267. The next prime is 22678256317. The reversal of 22678256281 is 18265287622.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22678256281 is a prime.

It is a super-2 number, since 2×22678256281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22678256261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2596 + ... + 212986.

It is an arithmetic number, because the mean of its divisors is an integer number (5669643616).

Almost surely, 2^22678256281 is an apocalyptic number.

It is an amenable number.

22678256281 is a deficient number, since it is larger than the sum of its proper divisors (318183).

22678256281 is a wasteful number, since it uses less digits than its factorization.

22678256281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318182.

The product of its digits is 1290240, while the sum is 49.

The spelling of 22678256281 in words is "twenty-two billion, six hundred seventy-eight million, two hundred fifty-six thousand, two hundred eighty-one".