51523253 has 4 divisors (see below), whose sum is σ = 51622668. Its totient is φ = 51423840.

The previous prime is 51523249. The next prime is 51523259. The reversal of 51523253 is 35232515.

51523253 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 an emirpimes, since its reverse is a distinct semiprime: 35232515 = 5 ⋅7046503.

It can be written as a sum of positive squares in 2 ways, for example, as 15547249 + 35976004 = 3943^2 + 5998^2 .

It is a cyclic number.

It is not a de Polignac number, because 51523253 - 2² = 51523249 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 (51523259) 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, 48926 + ... + 49967.

It is an arithmetic number, because the mean of its divisors is an integer number (12905667).

Almost surely, 2^51523253 is an apocalyptic number.

It is an amenable number.

51523253 is a deficient number, since it is larger than the sum of its proper divisors (99415).

51523253 is an equidigital number, since it uses as much as digits as its factorization.

51523253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99414.

The product of its digits is 4500, while the sum is 26.

The square root of 51523253 is about 7177.9699776469. The cubic root of 51523253 is about 372.1069300844.

Adding to 51523253 its reverse (35232515), we get a palindrome (86755768).

The spelling of 51523253 in words is "fifty-one million, five hundred twenty-three thousand, two hundred fifty-three".