81204246 has 24 divisors (see below), whose sum is σ = 176463144. Its totient is φ = 26988000.

The previous prime is 81204239. The next prime is 81204269. The reversal of 81204246 is 64240218.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255 + ... + 12746.

It is an arithmetic number, because the mean of its divisors is an integer number (7352631).

Almost surely, 2^81204246 is an apocalyptic number.

81204246 is an abundant number, since it is smaller than the sum of its proper divisors (95258898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81204246 is a wasteful number, since it uses less digits than its factorization.

81204246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13356 (or 13353 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 81204246 is about 9011.3398559815. The cubic root of 81204246 is about 433.0382370889.

The spelling of 81204246 in words is "eighty-one million, two hundred four thousand, two hundred forty-six".