451720253 has 4 divisors (see below), whose sum is σ = 471360288. Its totient is φ = 432080220.

The previous prime is 451720237. The next prime is 451720267. The reversal of 451720253 is 352027154.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 451720253 - 2⁴ = 451720237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451720223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9819983 + ... + 9820028.

It is an arithmetic number, because the mean of its divisors is an integer number (117840072).

Almost surely, 2^451720253 is an apocalyptic number.

It is an amenable number.

451720253 is a deficient number, since it is larger than the sum of its proper divisors (19640035).

451720253 is a wasteful number, since it uses less digits than its factorization.

451720253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19640034.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 451720253 is about 21253.7115111691. The cubic root of 451720253 is about 767.2846693330.

The spelling of 451720253 in words is "four hundred fifty-one million, seven hundred twenty thousand, two hundred fifty-three".