451473381 has 6 divisors (see below), whose sum is σ = 652128230. Its totient is φ = 300982248.

The previous prime is 451473377. The next prime is 451473419. The reversal of 451473381 is 183374154.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 396209025 + 55264356 = 19905^2 + 7434^2 .

It is not a de Polignac number, because 451473381 - 2² = 451473377 is a prime.

It is a super-2 number, since 2×451473381² = 407656427503142322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451473331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25081846 + ... + 25081863.

Almost surely, 2^451473381 is an apocalyptic number.

It is an amenable number.

451473381 is a deficient number, since it is larger than the sum of its proper divisors (200654849).

451473381 is a wasteful number, since it uses less digits than its factorization.

451473381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50163715 (or 50163712 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 451473381 is about 21247.9029788824. The cubic root of 451473381 is about 767.1448662747.

The spelling of 451473381 in words is "four hundred fifty-one million, four hundred seventy-three thousand, three hundred eighty-one".