451553213 has 4 divisors (see below), whose sum is σ = 462566748. Its totient is φ = 440539680.

The previous prime is 451553203. The next prime is 451553237. The reversal of 451553213 is 312355154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312355154 = 2 ⋅156177577.

It can be written as a sum of positive squares in 2 ways, for example, as 231861529 + 219691684 = 15227^2 + 14822^2 .

It is a cyclic number.

It is not a de Polignac number, because 451553213 - 2⁴ = 451553197 is a prime.

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 (451553203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5506706 + ... + 5506787.

It is an arithmetic number, because the mean of its divisors is an integer number (115641687).

Almost surely, 2^451553213 is an apocalyptic number.

It is an amenable number.

451553213 is a deficient number, since it is larger than the sum of its proper divisors (11013535).

451553213 is a wasteful number, since it uses less digits than its factorization.

451553213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11013534.

The product of its digits is 9000, while the sum is 29.

The square root of 451553213 is about 21249.7814812294. The cubic root of 451553213 is about 767.1900805311.

The spelling of 451553213 in words is "four hundred fifty-one million, five hundred fifty-three thousand, two hundred thirteen".