81854154 has 48 divisors (see below), whose sum is σ = 181958400. Its totient is φ = 26583648.

The previous prime is 81854107. The next prime is 81854197. The reversal of 81854154 is 45145818.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227827 + ... + 228185.

It is an arithmetic number, because the mean of its divisors is an integer number (3790800).

Almost surely, 2^81854154 is an apocalyptic number.

81854154 is an abundant number, since it is smaller than the sum of its proper divisors (100104246).

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

81854154 is a wasteful number, since it uses less digits than its factorization.

81854154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659 (or 656 counting only the distinct ones).

The product of its digits is 25600, while the sum is 36.

The square root of 81854154 is about 9047.3285559882. The cubic root of 81854154 is about 434.1904244810.

The spelling of 81854154 in words is "eighty-one million, eight hundred fifty-four thousand, one hundred fifty-four".