451431481 has 8 divisors (see below), whose sum is σ = 478180584. Its totient is φ = 424704000.

The previous prime is 451431437. The next prime is 451431493. The reversal of 451431481 is 184134154.

It can be written as a sum of positive squares in 4 ways, for example, as 47059600 + 404371881 = 6860^2 + 20109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 451431481 - 2⁷ = 451431353 is a prime.

It is a super-2 number, since 2×451431481² = 407580764075706722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (451431881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60981 + ... + 67981.

It is an arithmetic number, because the mean of its divisors is an integer number (59772573).

Almost surely, 2^451431481 is an apocalyptic number.

It is an amenable number.

451431481 is a deficient number, since it is larger than the sum of its proper divisors (26749103).

451431481 is a wasteful number, since it uses less digits than its factorization.

451431481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10811.

The product of its digits is 7680, while the sum is 31.

The square root of 451431481 is about 21246.9169763521. The cubic root of 451431481 is about 767.1211333404.

The spelling of 451431481 in words is "four hundred fifty-one million, four hundred thirty-one thousand, four hundred eighty-one".