1825665281 has 8 divisors (see below), whose sum is σ = 1993953024. Its totient is φ = 1657763920.

The previous prime is 1825665269. The next prime is 1825665301.

1825665281 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 1825665281 - 2¹⁸ = 1825403137 is a prime.

It is a super-2 number, since 2×1825665281² = 6666107436497617922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1825665251) 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 7 ways as a sum of consecutive naturals, for example, 86666 + ... + 105651.

It is an arithmetic number, because the mean of its divisors is an integer number (249244128).

Almost surely, 2^1825665281 is an apocalyptic number.

1825665281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1825665281 is a deficient number, since it is larger than the sum of its proper divisors (168287743).

1825665281 is a wasteful number, since it uses less digits than its factorization.

1825665281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193191.

The product of its digits is 230400, while the sum is 44.

The square root of 1825665281 is about 42727.8045422416. The cubic root of 1825665281 is about 1222.1946702846.

The spelling of 1825665281 in words is "one billion, eight hundred twenty-five million, six hundred sixty-five thousand, two hundred eighty-one".