1825115281 has 12 divisors (see below), whose sum is σ = 2101346064. Its totient is φ = 1571866200.

The previous prime is 1825115273. The next prime is 1825115321.

It is a happy number.

1825115281 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1825115281 - 2³ = 1825115273 is a prime.

It is a super-2 number, since 2×1825115281² = 6662091577879417922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1825115231) 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 11 ways as a sum of consecutive naturals, for example, 225835 + ... + 233776.

It is an arithmetic number, because the mean of its divisors is an integer number (175112172).

Almost surely, 2^1825115281 is an apocalyptic number.

1825115281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1825115281 is a deficient number, since it is larger than the sum of its proper divisors (276230783).

1825115281 is a wasteful number, since it uses less digits than its factorization.

1825115281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459660 (or 459641 counting only the distinct ones).

The product of its digits is 6400, while the sum is 34.

The square root of 1825115281 is about 42721.3679673299. The cubic root of 1825115281 is about 1222.0719251517.

The spelling of 1825115281 in words is "one billion, eight hundred twenty-five million, one hundred fifteen thousand, two hundred eighty-one".