81752204 has 6 divisors (see below), whose sum is σ = 143066364. Its totient is φ = 40876100.

The previous prime is 81752197. The next prime is 81752219. The reversal of 81752204 is 40225718.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10219022 + ... + 10219029.

It is an arithmetic number, because the mean of its divisors is an integer number (23844394).

Almost surely, 2^81752204 is an apocalyptic number.

It is an amenable number.

81752204 is a deficient number, since it is larger than the sum of its proper divisors (61314160).

81752204 is a wasteful number, since it uses less digits than its factorization.

81752204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20438055 (or 20438053 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 81752204 is about 9041.6925406696. The cubic root of 81752204 is about 434.0100870471.

The spelling of 81752204 in words is "eighty-one million, seven hundred fifty-two thousand, two hundred four".