81452202 has 128 divisors (see below), whose sum is σ = 202487040. Its totient is φ = 21565440.

The previous prime is 81452201. The next prime is 81452233. The reversal of 81452202 is 20225418.

It is a super-2 number, since 2×81452202² = 13268922421297608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81452201) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1335252 + ... + 1335312.

It is an arithmetic number, because the mean of its divisors is an integer number (1581930).

Almost surely, 2^81452202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81452202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101243520).

81452202 is an abundant number, since it is smaller than the sum of its proper divisors (121034838).

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

81452202 is a wasteful number, since it uses less digits than its factorization.

81452202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 81452202 is about 9025.0873679982. The cubic root of 81452202 is about 433.4785479128.

The spelling of 81452202 in words is "eighty-one million, four hundred fifty-two thousand, two hundred two".