825257819 has 8 divisors (see below), whose sum is σ = 846540288. Its totient is φ = 804130600.

The previous prime is 825257813. The next prime is 825257821. The reversal of 825257819 is 918752528.

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 825257819 - 2⁴ = 825257803 is a prime.

It is a super-2 number, since 2×825257819² = 1362100935641273522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825257813) 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, 28007 + ... + 49344.

It is an arithmetic number, because the mean of its divisors is an integer number (105817536).

Almost surely, 2^825257819 is an apocalyptic number.

825257819 is a deficient number, since it is larger than the sum of its proper divisors (21282469).

825257819 is a wasteful number, since it uses less digits than its factorization.

825257819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77625.

The product of its digits is 403200, while the sum is 47.

The square root of 825257819 is about 28727.3009348250. The cubic root of 825257819 is about 937.9864167136.

The spelling of 825257819 in words is "eight hundred twenty-five million, two hundred fifty-seven thousand, eight hundred nineteen".