819115141 has 4 divisors (see below), whose sum is σ = 882124012. Its totient is φ = 756106272.

The previous prime is 819115117. The next prime is 819115177. The reversal of 819115141 is 141511918.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 141511918 = 2 ⋅70755959.

It can be written as a sum of positive squares in 2 ways, for example, as 489692641 + 329422500 = 22129^2 + 18150^2 .

It is a cyclic number.

It is not a de Polignac number, because 819115141 - 2¹³ = 819106949 is a prime.

It is a super-2 number, since 2×819115141² = 1341899228430899762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819115841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31504416 + ... + 31504441.

It is an arithmetic number, because the mean of its divisors is an integer number (220531003).

Almost surely, 2^819115141 is an apocalyptic number.

It is an amenable number.

819115141 is a deficient number, since it is larger than the sum of its proper divisors (63008871).

819115141 is a wasteful number, since it uses less digits than its factorization.

819115141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63008870.

The product of its digits is 1440, while the sum is 31.

The square root of 819115141 is about 28620.1876478824. The cubic root of 819115141 is about 935.6533666201.

It can be divided in two parts, 8191 and 15141, that added together give a palindrome (23332).

The spelling of 819115141 in words is "eight hundred nineteen million, one hundred fifteen thousand, one hundred forty-one".