51403253 has 4 divisors (see below), whose sum is σ = 56076288. Its totient is φ = 46730220.

The previous prime is 51403207. The next prime is 51403273. The reversal of 51403253 is 35230415.

51403253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51403253 - 2¹² = 51399157 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 (51403273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2336501 + ... + 2336522.

It is an arithmetic number, because the mean of its divisors is an integer number (14019072).

Almost surely, 2^51403253 is an apocalyptic number.

It is an amenable number.

51403253 is a deficient number, since it is larger than the sum of its proper divisors (4673035).

51403253 is a wasteful number, since it uses less digits than its factorization.

51403253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4673034.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 51403253 is about 7169.6061956010. The cubic root of 51403253 is about 371.8178208629.

Adding to 51403253 its reverse (35230415), we get a palindrome (86633668).

It can be divided in two parts, 51 and 403253, that added together give a palindrome (403304).

The spelling of 51403253 in words is "fifty-one million, four hundred three thousand, two hundred fifty-three".