82021372 has 12 divisors (see below), whose sum is σ = 144931696. Its totient is φ = 40612320.

The previous prime is 82021351. The next prime is 82021399. The reversal of 82021372 is 27312028.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99129 + ... + 99952.

Almost surely, 2^82021372 is an apocalyptic number.

It is an amenable number.

82021372 is a deficient number, since it is larger than the sum of its proper divisors (62910324).

82021372 is a wasteful number, since it uses less digits than its factorization.

82021372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199188 (or 199186 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 82021372 is about 9056.5651325434. The cubic root of 82021372 is about 434.4858893057.

The spelling of 82021372 in words is "eighty-two million, twenty-one thousand, three hundred seventy-two".