81485306 has 16 divisors (see below), whose sum is σ = 139864320. Its totient is φ = 34878480.

The previous prime is 81485303. The next prime is 81485309. The reversal of 81485306 is 60358418.

It is an interprime number because it is at equal distance from previous prime (81485303) and next prime (81485309).

It is not an unprimeable number, because it can be changed into a prime (81485303) 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, 9560 + ... + 15948.

It is an arithmetic number, because the mean of its divisors is an integer number (8741520).

Almost surely, 2^81485306 is an apocalyptic number.

81485306 is a deficient number, since it is larger than the sum of its proper divisors (58379014).

81485306 is a wasteful number, since it uses less digits than its factorization.

81485306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7309.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 81485306 is about 9026.9211805576. The cubic root of 81485306 is about 433.5372650905.

The spelling of 81485306 in words is "eighty-one million, four hundred eighty-five thousand, three hundred six".