181431327541 has 16 divisors (see below), whose sum is σ = 196175133760. Its totient is φ = 167208572160.

The previous prime is 181431327521. The next prime is 181431327577. The reversal of 181431327541 is 145723134181.

It is a cyclic number.

It is not a de Polignac number, because 181431327541 - 2⁵ = 181431327509 is a prime.

It is a super-2 number, since 2×181431327541² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 181431327494 and 181431327503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181431327521) 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, 4942786 + ... + 4979356.

It is an arithmetic number, because the mean of its divisors is an integer number (12260945860).

Almost surely, 2^181431327541 is an apocalyptic number.

It is an amenable number.

181431327541 is a deficient number, since it is larger than the sum of its proper divisors (14743806219).

181431327541 is a wasteful number, since it uses less digits than its factorization.

181431327541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43684.

The product of its digits is 80640, while the sum is 40.

The spelling of 181431327541 in words is "one hundred eighty-one billion, four hundred thirty-one million, three hundred twenty-seven thousand, five hundred forty-one".