224578581981 has 12 divisors (see below), whose sum is σ = 324243633888. Its totient is φ = 138202203984.

The previous prime is 224578581977. The next prime is 224578582009. The reversal of 224578581981 is 189185875422.

It is not a de Polignac number, because 224578581981 - 2² = 224578581977 is a prime.

It is a super-2 number, since 2×224578581981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224578581281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221477385 + ... + 221478398.

It is an arithmetic number, because the mean of its divisors is an integer number (27020302824).

Almost surely, 2^224578581981 is an apocalyptic number.

It is an amenable number.

224578581981 is a deficient number, since it is larger than the sum of its proper divisors (99665051907).

224578581981 is a wasteful number, since it uses less digits than its factorization.

224578581981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442955812 (or 442955799 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 60.

The spelling of 224578581981 in words is "two hundred twenty-four billion, five hundred seventy-eight million, five hundred eighty-one thousand, nine hundred eighty-one".