825478019 has 8 divisors (see below), whose sum is σ = 832228320. Its totient is φ = 818738496.

The previous prime is 825477943. The next prime is 825478067. The reversal of 825478019 is 910874528.

825478019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-825478019 is a prime.

It is a super-2 number, since 2×825478019² = 1362827919704328722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (825478079) 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, 230162 + ... + 233720.

It is an arithmetic number, because the mean of its divisors is an integer number (104028540).

Almost surely, 2^825478019 is an apocalyptic number.

825478019 is a deficient number, since it is larger than the sum of its proper divisors (6750301).

825478019 is a wasteful number, since it uses less digits than its factorization.

825478019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5389.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 825478019 is about 28731.1332703741. The cubic root of 825478019 is about 938.0698355905.

The spelling of 825478019 in words is "eight hundred twenty-five million, four hundred seventy-eight thousand, nineteen".