180421331 has 2 divisors, whose sum is σ = 180421332. Its totient is φ = 180421330.

The previous prime is 180421309. The next prime is 180421393. The reversal of 180421331 is 133124081.

It is a weak prime.

It is an emirp because it is prime and its reverse (133124081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 180421331 - 2¹⁰ = 180420307 is a prime.

It is a super-2 number, since 2×180421331² = 65103713359623122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 180421297 and 180421306.

It is not a weakly prime, because it can be changed into another prime (180421301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90210665 + 90210666.

It is an arithmetic number, because the mean of its divisors is an integer number (90210666).

Almost surely, 2^180421331 is an apocalyptic number.

180421331 is a deficient number, since it is larger than the sum of its proper divisors (1).

180421331 is an equidigital number, since it uses as much as digits as its factorization.

180421331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 180421331 is about 13432.1007664475. The cubic root of 180421331 is about 565.0618158799.

The spelling of 180421331 in words is "one hundred eighty million, four hundred twenty-one thousand, three hundred thirty-one".