81303514 has 16 divisors (see below), whose sum is σ = 128572416. Its totient is φ = 38502000.

The previous prime is 81303511. The next prime is 81303517. The reversal of 81303514 is 41530318.

It is an interprime number because it is at equal distance from previous prime (81303511) and next prime (81303517).

It is a super-2 number, since 2×81303514² = 13220522777496392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81303511) 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, 11037 + ... + 16864.

It is an arithmetic number, because the mean of its divisors is an integer number (8035776).

Almost surely, 2^81303514 is an apocalyptic number.

81303514 is a deficient number, since it is larger than the sum of its proper divisors (47268902).

81303514 is a wasteful number, since it uses less digits than its factorization.

81303514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27981.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 81303514 is about 9016.8461226750. The cubic root of 81303514 is about 433.2146208674.

The spelling of 81303514 in words is "eighty-one million, three hundred three thousand, five hundred fourteen".