81103542 has 16 divisors (see below), whose sum is σ = 174684720. Its totient is φ = 24954912.

The previous prime is 81103523. The next prime is 81103573. The reversal of 81103542 is 24530118.

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, 519817 + ... + 519972.

It is an arithmetic number, because the mean of its divisors is an integer number (10917795).

Almost surely, 2^81103542 is an apocalyptic number.

81103542 is an abundant number, since it is smaller than the sum of its proper divisors (93581178).

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

81103542 is a wasteful number, since it uses less digits than its factorization.

81103542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039807.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 81103542 is about 9005.7504962107. The cubic root of 81103542 is about 432.8591548199.

The spelling of 81103542 in words is "eighty-one million, one hundred three thousand, five hundred forty-two".