451340251 has 2 divisors, whose sum is σ = 451340252. Its totient is φ = 451340250.

The previous prime is 451340243. The next prime is 451340261. The reversal of 451340251 is 152043154.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 451340251 - 2³ = 451340243 is a prime.

It is not a weakly prime, because it can be changed into another prime (451340261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225670125 + 225670126.

It is an arithmetic number, because the mean of its divisors is an integer number (225670126).

Almost surely, 2^451340251 is an apocalyptic number.

451340251 is a deficient number, since it is larger than the sum of its proper divisors (1).

451340251 is an equidigital number, since it uses as much as digits as its factorization.

451340251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 451340251 is about 21244.7699681592. The cubic root of 451340251 is about 767.0694539022.

The spelling of 451340251 in words is "four hundred fifty-one million, three hundred forty thousand, two hundred fifty-one".