81450282 has 16 divisors (see below), whose sum is σ = 162997632. Its totient is φ = 27133920.

The previous prime is 81450233. The next prime is 81450353. The reversal of 81450282 is 28205418.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11407 + ... + 17117.

It is an arithmetic number, because the mean of its divisors is an integer number (10187352).

Almost surely, 2^81450282 is an apocalyptic number.

81450282 is an abundant number, since it is smaller than the sum of its proper divisors (81547350).

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

81450282 is a wasteful number, since it uses less digits than its factorization.

81450282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8093.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 81450282 is about 9024.9809972099. The cubic root of 81450282 is about 433.4751418852.

The spelling of 81450282 in words is "eighty-one million, four hundred fifty thousand, two hundred eighty-two".