181037412 has 18 divisors (see below), whose sum is σ = 457622438. Its totient is φ = 60345792.

The previous prime is 181037387. The next prime is 181037431. The reversal of 181037412 is 214730181.

It can be written as a sum of positive squares in only one way, i.e., 127103076 + 53934336 = 11274^2 + 7344^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 2514373 + ... + 2514444.

Almost surely, 2^181037412 is an apocalyptic number.

181037412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181037412 is an abundant number, since it is smaller than the sum of its proper divisors (276585026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181037412 is a wasteful number, since it uses less digits than its factorization.

181037412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5028827 (or 5028822 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 181037412 is about 13455.0143812632. The cubic root of 181037412 is about 565.7042535061.

Adding to 181037412 its reverse (214730181), we get a palindrome (395767593).

The spelling of 181037412 in words is "one hundred eighty-one million, thirty-seven thousand, four hundred twelve".