451571641 has 2 divisors, whose sum is σ = 451571642. Its totient is φ = 451571640.

The previous prime is 451571639. The next prime is 451571647. The reversal of 451571641 is 146175154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 450925225 + 646416 = 21235^2 + 804^2 .

It is a cyclic number.

It is not a de Polignac number, because 451571641 - 2¹ = 451571639 is a prime.

Together with 451571639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 451571597 and 451571606.

It is not a weakly prime, because it can be changed into another prime (451571647) 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, 225785820 + 225785821.

It is an arithmetic number, because the mean of its divisors is an integer number (225785821).

Almost surely, 2^451571641 is an apocalyptic number.

It is an amenable number.

451571641 is a deficient number, since it is larger than the sum of its proper divisors (1).

451571641 is an equidigital number, since it uses as much as digits as its factorization.

451571641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 34.

The square root of 451571641 is about 21250.2150812645. The cubic root of 451571641 is about 767.2005167957.

The spelling of 451571641 in words is "four hundred fifty-one million, five hundred seventy-one thousand, six hundred forty-one".