181125331 has 16 divisors (see below), whose sum is σ = 192665088. Its totient is φ = 170049600.

The previous prime is 181125319. The next prime is 181125349. The reversal of 181125331 is 133521181.

181125331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181125331 is a prime.

It is a super-2 number, since 2×181125331² = 65612771059719122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 181125296 and 181125305.

It is not an unprimeable number, because it can be changed into a prime (181125311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124450 + ... + 125896.

It is an arithmetic number, because the mean of its divisors is an integer number (12041568).

Almost surely, 2^181125331 is an apocalyptic number.

181125331 is a deficient number, since it is larger than the sum of its proper divisors (11539757).

181125331 is a wasteful number, since it uses less digits than its factorization.

181125331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602.

The product of its digits is 720, while the sum is 25.

The square root of 181125331 is about 13458.2811309617. The cubic root of 181125331 is about 565.7958148812.

The spelling of 181125331 in words is "one hundred eighty-one million, one hundred twenty-five thousand, three hundred thirty-one".