181025812 has 12 divisors (see below), whose sum is σ = 345594816. Its totient is φ = 82284440.

The previous prime is 181025797. The next prime is 181025837. The reversal of 181025812 is 218520181.

It is a super-2 number, since 2×181025812² = 65540689220518688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2057068 + ... + 2057155.

It is an arithmetic number, because the mean of its divisors is an integer number (28799568).

Almost surely, 2^181025812 is an apocalyptic number.

It is an amenable number.

181025812 is a deficient number, since it is larger than the sum of its proper divisors (164569004).

181025812 is a wasteful number, since it uses less digits than its factorization.

181025812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4114238 (or 4114236 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 181025812 is about 13454.5833083006. The cubic root of 181025812 is about 565.6921707190.

Adding to 181025812 its reverse (218520181), we get a palindrome (399545993).

The spelling of 181025812 in words is "one hundred eighty-one million, twenty-five thousand, eight hundred twelve".