81345335 has 8 divisors (see below), whose sum is σ = 98004816. Its totient is φ = 64816000.

The previous prime is 81345281. The next prime is 81345337. The reversal of 81345335 is 53354318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81345335 - 2¹⁰ = 81344311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81345337) 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, 31154 + ... + 33663.

It is an arithmetic number, because the mean of its divisors is an integer number (12250602).

Almost surely, 2^81345335 is an apocalyptic number.

81345335 is a deficient number, since it is larger than the sum of its proper divisors (16659481).

81345335 is a wasteful number, since it uses less digits than its factorization.

81345335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65073.

The product of its digits is 21600, while the sum is 32.

The square root of 81345335 is about 9019.1648726476. The cubic root of 81345335 is about 433.2888872889.

The spelling of 81345335 in words is "eighty-one million, three hundred forty-five thousand, three hundred thirty-five".