819225406 has 16 divisors (see below), whose sum is σ = 1286350848. Its totient is φ = 390814200.

The previous prime is 819225403. The next prime is 819225409. The reversal of 819225406 is 604522918.

819225406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (819225403) and next prime (819225409).

It is a super-2 number, since 2×819225406² = 1342260531671729672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819225403) 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, 88650 + ... + 97453.

It is an arithmetic number, because the mean of its divisors is an integer number (80396928).

Almost surely, 2^819225406 is an apocalyptic number.

819225406 is a deficient number, since it is larger than the sum of its proper divisors (467125442).

819225406 is a wasteful number, since it uses less digits than its factorization.

819225406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186207.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 819225406 is about 28622.1139331112. The cubic root of 819225406 is about 935.6953489920.

The spelling of 819225406 in words is "eight hundred nineteen million, two hundred twenty-five thousand, four hundred six".