450020251 has 2 divisors, whose sum is σ = 450020252. Its totient is φ = 450020250.

The previous prime is 450020201. The next prime is 450020267. The reversal of 450020251 is 152020054.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450020251 is a prime.

It is not a weakly prime, because it can be changed into another prime (450020201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225010125 + 225010126.

It is an arithmetic number, because the mean of its divisors is an integer number (225010126).

Almost surely, 2^450020251 is an apocalyptic number.

450020251 is a deficient number, since it is larger than the sum of its proper divisors (1).

450020251 is an equidigital number, since it uses as much as digits as its factorization.

450020251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 450020251 is about 21213.6807508740. The cubic root of 450020251 is about 766.3209274302.

The spelling of 450020251 in words is "four hundred fifty million, twenty thousand, two hundred fifty-one".