81201046 has 4 divisors (see below), whose sum is σ = 121801572. Its totient is φ = 40600522.

The previous prime is 81200963. The next prime is 81201049. The reversal of 81201046 is 64010218.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81201049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20300260 + ... + 20300263.

It is an arithmetic number, because the mean of its divisors is an integer number (30450393).

Almost surely, 2^81201046 is an apocalyptic number.

81201046 is a deficient number, since it is larger than the sum of its proper divisors (40600526).

81201046 is a wasteful number, since it uses less digits than its factorization.

81201046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40600525.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 81201046 is about 9011.1623001697. The cubic root of 81201046 is about 433.0325487962.

The spelling of 81201046 in words is "eighty-one million, two hundred one thousand, forty-six".