81350160 has 40 divisors (see below), whose sum is σ = 252186240. Its totient is φ = 21693312.

The previous prime is 81350123. The next prime is 81350197. The reversal of 81350160 is 6105318.

It is an interprime number because it is at equal distance from previous prime (81350123) and next prime (81350197).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 81350160.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169240 + ... + 169719.

It is an arithmetic number, because the mean of its divisors is an integer number (6304656).

Almost surely, 2^81350160 is an apocalyptic number.

81350160 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81350160 is an abundant number, since it is smaller than the sum of its proper divisors (170836080).

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

81350160 is a wasteful number, since it uses less digits than its factorization.

81350160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338975 (or 338969 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 81350160 is about 9019.4323546441. The cubic root of 81350160 is about 433.2974539655.

Adding to 81350160 its reverse (6105318), we get a palindrome (87455478).

The spelling of 81350160 in words is "eighty-one million, three hundred fifty thousand, one hundred sixty".