81044942 has 16 divisors (see below), whose sum is σ = 134600832. Its totient is φ = 36288120.

The previous prime is 81044941. The next prime is 81044947. The reversal of 81044942 is 24944018.

It is a junction number, because it is equal to n+sod(n) for n = 81044899 and 81044908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81044941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26018 + ... + 28965.

It is an arithmetic number, because the mean of its divisors is an integer number (8412552).

Almost surely, 2^81044942 is an apocalyptic number.

81044942 is a deficient number, since it is larger than the sum of its proper divisors (53555890).

81044942 is a wasteful number, since it uses less digits than its factorization.

81044942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55063.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 81044942 is about 9002.4964315461. The cubic root of 81044942 is about 432.7548780010.

The spelling of 81044942 in words is "eighty-one million, forty-four thousand, nine hundred forty-two".