81255702 has 32 divisors (see below), whose sum is σ = 178231680. Its totient is φ = 24491520.

The previous prime is 81255683. The next prime is 81255749. The reversal of 81255702 is 20755218.

It is a self number, because there is not a number n which added to its sum of digits gives 81255702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9549 + ... + 15927.

It is an arithmetic number, because the mean of its divisors is an integer number (5569740).

Almost surely, 2^81255702 is an apocalyptic number.

81255702 is an abundant number, since it is smaller than the sum of its proper divisors (96975978).

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

81255702 is a wasteful number, since it uses less digits than its factorization.

81255702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6588.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 81255702 is about 9014.1944731629. The cubic root of 81255702 is about 433.1296843214.

The spelling of 81255702 in words is "eighty-one million, two hundred fifty-five thousand, seven hundred two".