401731219 has 2 divisors, whose sum is σ = 401731220. Its totient is φ = 401731218.

The previous prime is 401731217. The next prime is 401731249. The reversal of 401731219 is 912137104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401731219 - 2¹ = 401731217 is a prime.

It is a super-2 number, since 2×401731219² = 322775944638451922, which contains 22 as substring.

Together with 401731217, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (401731217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200865609 + 200865610.

It is an arithmetic number, because the mean of its divisors is an integer number (200865610).

Almost surely, 2^401731219 is an apocalyptic number.

401731219 is a deficient number, since it is larger than the sum of its proper divisors (1).

401731219 is an equidigital number, since it uses as much as digits as its factorization.

401731219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 401731219 is about 20043.2337460800. The cubic root of 401731219 is about 737.8677474202.

The spelling of 401731219 in words is "four hundred one million, seven hundred thirty-one thousand, two hundred nineteen".