82251989 has 8 divisors (see below), whose sum is σ = 83446272. Its totient is φ = 81065520.

The previous prime is 82251977. The next prime is 82251997. The reversal of 82251989 is 98915228.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82251989 - 2¹⁶ = 82186453 is a prime.

It is a super-2 number, since 2×82251989² = 13530779388912242, 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 (82251929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21179 + ... + 24759.

It is an arithmetic number, because the mean of its divisors is an integer number (10430784).

Almost surely, 2^82251989 is an apocalyptic number.

It is an amenable number.

82251989 is a deficient number, since it is larger than the sum of its proper divisors (1194283).

82251989 is a wasteful number, since it uses less digits than its factorization.

82251989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3907.

The product of its digits is 103680, while the sum is 44.

The square root of 82251989 is about 9069.2882300652. The cubic root of 82251989 is about 434.8927185125.

The spelling of 82251989 in words is "eighty-two million, two hundred fifty-one thousand, nine hundred eighty-nine".