451321291 has 2 divisors, whose sum is σ = 451321292. Its totient is φ = 451321290.

The previous prime is 451321289. The next prime is 451321357. The reversal of 451321291 is 192123154.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 451321291 - 2¹ = 451321289 is a prime.

Together with 451321289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (451321261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225660645 + 225660646.

It is an arithmetic number, because the mean of its divisors is an integer number (225660646).

Almost surely, 2^451321291 is an apocalyptic number.

451321291 is a deficient number, since it is larger than the sum of its proper divisors (1).

451321291 is an equidigital number, since it uses as much as digits as its factorization.

451321291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 451321291 is about 21244.3237360006. The cubic root of 451321291 is about 767.0587126780.

The spelling of 451321291 in words is "four hundred fifty-one million, three hundred twenty-one thousand, two hundred ninety-one".