180002131 has 2 divisors, whose sum is σ = 180002132. Its totient is φ = 180002130.

The previous prime is 180002129. The next prime is 180002149. The reversal of 180002131 is 131200081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 180002131 - 2¹ = 180002129 is a prime.

It is a super-2 number, since 2×180002131² = 64801534329082322, which contains 22 as substring.

Together with 180002129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (180006131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90001065 + 90001066.

It is an arithmetic number, because the mean of its divisors is an integer number (90001066).

Almost surely, 2^180002131 is an apocalyptic number.

180002131 is a deficient number, since it is larger than the sum of its proper divisors (1).

180002131 is an equidigital number, since it uses as much as digits as its factorization.

180002131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 180002131 is about 13416.4872824447. The cubic root of 180002131 is about 564.6238454840.

The spelling of 180002131 in words is "one hundred eighty million, two thousand, one hundred thirty-one".