451340381 has 2 divisors, whose sum is σ = 451340382. Its totient is φ = 451340380.

The previous prime is 451340297. The next prime is 451340401. The reversal of 451340381 is 183043154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 409414756 + 41925625 = 20234^2 + 6475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-451340381 is a prime.

It is a super-2 number, since 2×451340381² = 407416279042450322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451340081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225670190 + 225670191.

It is an arithmetic number, because the mean of its divisors is an integer number (225670191).

Almost surely, 2^451340381 is an apocalyptic number.

It is an amenable number.

451340381 is a deficient number, since it is larger than the sum of its proper divisors (1).

451340381 is an equidigital number, since it uses as much as digits as its factorization.

451340381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 451340381 is about 21244.7730277356. The cubic root of 451340381 is about 767.0695275488.

The spelling of 451340381 in words is "four hundred fifty-one million, three hundred forty thousand, three hundred eighty-one".