825278213 has 8 divisors (see below), whose sum is σ = 846668928. Its totient is φ = 804160224.

The previous prime is 825278191. The next prime is 825278219. The reversal of 825278213 is 312872528.

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 825278213 - 2⁶ = 825278149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825278219) 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, 62045 + ... + 74162.

It is an arithmetic number, because the mean of its divisors is an integer number (105833616).

Almost surely, 2^825278213 is an apocalyptic number.

825278213 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

825278213 is a deficient number, since it is larger than the sum of its proper divisors (21390715).

825278213 is a wasteful number, since it uses less digits than its factorization.

825278213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136363.

The product of its digits is 53760, while the sum is 38.

The square root of 825278213 is about 28727.6558911443. The cubic root of 825278213 is about 937.9941432434.

The spelling of 825278213 in words is "eight hundred twenty-five million, two hundred seventy-eight thousand, two hundred thirteen".