81542054 has 16 divisors (see below), whose sum is σ = 134256960. Its totient is φ = 36835560.

The previous prime is 81542033. The next prime is 81542063. The reversal of 81542054 is 45024518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7784 + ... + 14955.

It is an arithmetic number, because the mean of its divisors is an integer number (8391060).

Almost surely, 2^81542054 is an apocalyptic number.

81542054 is a deficient number, since it is larger than the sum of its proper divisors (52714906).

81542054 is a wasteful number, since it uses less digits than its factorization.

81542054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22915.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 81542054 is about 9030.0638978913. The cubic root of 81542054 is about 433.6378830830.

The spelling of 81542054 in words is "eighty-one million, five hundred forty-two thousand, fifty-four".