81303110 has 32 divisors (see below), whose sum is σ = 171148032. Its totient is φ = 27226080.

The previous prime is 81303083. The next prime is 81303119. The reversal of 81303110 is 1130318.

It is a super-2 number, since 2×81303110² = 13220391391344200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81303119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10496 + ... + 16515.

It is an arithmetic number, because the mean of its divisors is an integer number (5348376).

Almost surely, 2^81303110 is an apocalyptic number.

81303110 is an abundant number, since it is smaller than the sum of its proper divisors (89844922).

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

81303110 is a wasteful number, since it uses less digits than its factorization.

81303110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27068.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 81303110 is about 9016.8237201356. The cubic root of 81303110 is about 433.2139033134.

Adding to 81303110 its reverse (1130318), we get a palindrome (82433428).

The spelling of 81303110 in words is "eighty-one million, three hundred three thousand, one hundred ten".