819125881 has 8 divisors (see below), whose sum is σ = 936452480. Its totient is φ = 701876448.

The previous prime is 819125863. The next prime is 819125899. The reversal of 819125881 is 188521918.

It is an interprime number because it is at equal distance from previous prime (819125863) and next prime (819125899).

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

It is not a de Polignac number, because 819125881 - 2⁵ = 819125849 is a prime.

It is a super-2 number, since 2×819125881² = 1341934417848052322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (819125821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5605 + ... + 40861.

It is an arithmetic number, because the mean of its divisors is an integer number (117056560).

Almost surely, 2^819125881 is an apocalyptic number.

It is an amenable number.

819125881 is a deficient number, since it is larger than the sum of its proper divisors (117326599).

819125881 is a wasteful number, since it uses less digits than its factorization.

819125881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38583.

The product of its digits is 46080, while the sum is 43.

The square root of 819125881 is about 28620.3752770644. The cubic root of 819125881 is about 935.6574559407.

The spelling of 819125881 in words is "eight hundred nineteen million, one hundred twenty-five thousand, eight hundred eighty-one".