451504381 has 2 divisors, whose sum is σ = 451504382. Its totient is φ = 451504380.

The previous prime is 451504363. The next prime is 451504399. The reversal of 451504381 is 183405154.

It is a balanced prime because it is at equal distance from previous prime (451504363) and next prime (451504399).

It can be written as a sum of positive squares in only one way, i.e., 312971481 + 138532900 = 17691^2 + 11770^2 .

It is a cyclic number.

It is not a de Polignac number, because 451504381 - 2¹³ = 451496189 is a prime.

It is a super-2 number, since 2×451504381² = 407712412124386322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451504481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225752190 + 225752191.

It is an arithmetic number, because the mean of its divisors is an integer number (225752191).

Almost surely, 2^451504381 is an apocalyptic number.

It is an amenable number.

451504381 is a deficient number, since it is larger than the sum of its proper divisors (1).

451504381 is an equidigital number, since it uses as much as digits as its factorization.

451504381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 451504381 is about 21248.6324501131. The cubic root of 451504381 is about 767.1624243025.

The spelling of 451504381 in words is "four hundred fifty-one million, five hundred four thousand, three hundred eighty-one".