16312001 has 2 divisors, whose sum is σ = 16312002. Its totient is φ = 16312000.

The previous prime is 16311943. The next prime is 16312003. The reversal of 16312001 is 10021361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10086976 + 6225025 = 3176^2 + 2495^2 .

It is a cyclic number.

It is not a de Polignac number, because 16312001 - 2²² = 12117697 is a prime.

Together with 16312003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16312003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8156000 + 8156001.

It is an arithmetic number, because the mean of its divisors is an integer number (8156001).

Almost surely, 2^16312001 is an apocalyptic number.

It is an amenable number.

16312001 is a deficient number, since it is larger than the sum of its proper divisors (1).

16312001 is an equidigital number, since it uses as much as digits as its factorization.

16312001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 16312001 is about 4038.8118302293. The cubic root of 16312001 is about 253.6115800505.

Adding to 16312001 its reverse (10021361), we get a palindrome (26333362).

The spelling of 16312001 in words is "sixteen million, three hundred twelve thousand, one".