81444102 has 16 divisors (see below), whose sum is σ = 164951040. Its totient is φ = 26804232.

The previous prime is 81444049. The next prime is 81444109. The reversal of 81444102 is 20144418.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81444109) 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, 85438 + ... + 86385.

It is an arithmetic number, because the mean of its divisors is an integer number (10309440).

Almost surely, 2^81444102 is an apocalyptic number.

81444102 is an abundant number, since it is smaller than the sum of its proper divisors (83506938).

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

81444102 is a wasteful number, since it uses less digits than its factorization.

81444102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171907.

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 81444102 is about 9024.6386077227. The cubic root of 81444102 is about 433.4641783703.

It can be divided in two parts, 8144 and 4102, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 81444102 in words is "eighty-one million, four hundred forty-four thousand, one hundred two".