81038102 has 4 divisors (see below), whose sum is σ = 121557156. Its totient is φ = 40519050.

The previous prime is 81038081. The next prime is 81038107. The reversal of 81038102 is 20183018.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20183018 = 2 ⋅10091509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81038107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20259524 + ... + 20259527.

It is an arithmetic number, because the mean of its divisors is an integer number (30389289).

Almost surely, 2^81038102 is an apocalyptic number.

81038102 is a deficient number, since it is larger than the sum of its proper divisors (40519054).

81038102 is a wasteful number, since it uses less digits than its factorization.

81038102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40519053.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 81038102 is about 9002.1165289059. The cubic root of 81038102 is about 432.7427031649.

The spelling of 81038102 in words is "eighty-one million, thirty-eight thousand, one hundred two".