82251491 has 8 divisors (see below), whose sum is σ = 99531360. Its totient is φ = 66354048.

The previous prime is 82251469. The next prime is 82251493. The reversal of 82251491 is 19415228.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82251491 is a prime.

It is a super-3 number, since 3×82251491³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82251493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345476 + ... + 345713.

It is an arithmetic number, because the mean of its divisors is an integer number (12441420).

Almost surely, 2^82251491 is an apocalyptic number.

82251491 is a deficient number, since it is larger than the sum of its proper divisors (17279869).

82251491 is a wasteful number, since it uses less digits than its factorization.

82251491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691213.

The product of its digits is 5760, while the sum is 32.

The square root of 82251491 is about 9069.2607747269. The cubic root of 82251491 is about 434.8918408153.

The spelling of 82251491 in words is "eighty-two million, two hundred fifty-one thousand, four hundred ninety-one".