81924226 has 8 divisors (see below), whose sum is σ = 122930064. Its totient is φ = 40947540.

The previous prime is 81924221. The next prime is 81924239. The reversal of 81924226 is 62242918.

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

It is a junction number, because it is equal to n+sod(n) for n = 81924191 and 81924200.

It is not an unprimeable number, because it can be changed into a prime (81924221) 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, 2221 + ... + 12991.

It is an arithmetic number, because the mean of its divisors is an integer number (15366258).

Almost surely, 2^81924226 is an apocalyptic number.

81924226 is a deficient number, since it is larger than the sum of its proper divisors (41005838).

81924226 is a wasteful number, since it uses less digits than its factorization.

81924226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14576.

The product of its digits is 13824, while the sum is 34.

The square root of 81924226 is about 9051.2002519003. The cubic root of 81924226 is about 434.3142867096.

The spelling of 81924226 in words is "eighty-one million, nine hundred twenty-four thousand, two hundred twenty-six".