451666231 has 2 divisors, whose sum is σ = 451666232. Its totient is φ = 451666230.

The previous prime is 451666211. The next prime is 451666253. The reversal of 451666231 is 132666154.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 451666231 - 2¹⁷ = 451535159 is a prime.

It is a super-2 number, since 2×451666231² = 408004768451490722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451666211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225833115 + 225833116.

It is an arithmetic number, because the mean of its divisors is an integer number (225833116).

Almost surely, 2^451666231 is an apocalyptic number.

451666231 is a deficient number, since it is larger than the sum of its proper divisors (1).

451666231 is an equidigital number, since it uses as much as digits as its factorization.

451666231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 451666231 is about 21252.4405892594. The cubic root of 451666231 is about 767.2540811503.

The spelling of 451666231 in words is "four hundred fifty-one million, six hundred sixty-six thousand, two hundred thirty-one".