81326102 has 16 divisors (see below), whose sum is σ = 143316432. Its totient is φ = 34122720.

The previous prime is 81326059. The next prime is 81326107. The reversal of 81326102 is 20162318.

It is a super-2 number, since 2×81326102² = 13227869733028808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81326107) 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, 141893 + ... + 142464.

It is an arithmetic number, because the mean of its divisors is an integer number (8957277).

Almost surely, 2^81326102 is an apocalyptic number.

81326102 is a deficient number, since it is larger than the sum of its proper divisors (61990330).

81326102 is a wasteful number, since it uses less digits than its factorization.

81326102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284383.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 81326102 is about 9018.0985800777. The cubic root of 81326102 is about 433.2547361724.

The spelling of 81326102 in words is "eighty-one million, three hundred twenty-six thousand, one hundred two".