81262160 has 120 divisors (see below), whose sum is σ = 224592768. Its totient is φ = 26784000.

The previous prime is 81262157. The next prime is 81262169. The reversal of 81262160 is 6126218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81262169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 538085 + ... + 538235.

Almost surely, 2^81262160 is an apocalyptic number.

81262160 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81262160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112296384).

81262160 is an abundant number, since it is smaller than the sum of its proper divisors (143330608).

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

81262160 is a wasteful number, since it uses less digits than its factorization.

81262160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 81262160 is about 9014.5526788632. The cubic root of 81262160 is about 433.1411587055.

Adding to 81262160 its reverse (6126218), we get a palindrome (87388378).

The spelling of 81262160 in words is "eighty-one million, two hundred sixty-two thousand, one hundred sixty".