82169351 has 4 divisors (see below), whose sum is σ = 89639304. Its totient is φ = 74699400.

The previous prime is 82169309. The next prime is 82169369. The reversal of 82169351 is 15396128.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82169351 is a prime.

It is a super-2 number, since 2×82169351² = 13503604487522402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82169051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3734960 + ... + 3734981.

It is an arithmetic number, because the mean of its divisors is an integer number (22409826).

Almost surely, 2^82169351 is an apocalyptic number.

82169351 is a deficient number, since it is larger than the sum of its proper divisors (7469953).

82169351 is a wasteful number, since it uses less digits than its factorization.

82169351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7469952.

The product of its digits is 12960, while the sum is 35.

The square root of 82169351 is about 9064.7311598304. The cubic root of 82169351 is about 434.7470251483.

The spelling of 82169351 in words is "eighty-two million, one hundred sixty-nine thousand, three hundred fifty-one".