81855062 has 8 divisors (see below), whose sum is σ = 123063600. Its totient is φ = 40833864.

The previous prime is 81855047. The next prime is 81855073. The reversal of 81855062 is 26055818.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45737 + ... + 47492.

It is an arithmetic number, because the mean of its divisors is an integer number (15382950).

Almost surely, 2^81855062 is an apocalyptic number.

81855062 is a deficient number, since it is larger than the sum of its proper divisors (41208538).

81855062 is a wasteful number, since it uses less digits than its factorization.

81855062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93670.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 81855062 is about 9047.3787364076. The cubic root of 81855062 is about 434.1920299522.

The spelling of 81855062 in words is "eighty-one million, eight hundred fifty-five thousand, sixty-two".