51503253 has 16 divisors (see below), whose sum is σ = 69840960. Its totient is φ = 33755904.

The previous prime is 51503239. The next prime is 51503299. The reversal of 51503253 is 35230515.

It is not a de Polignac number, because 51503253 - 2⁶ = 51503189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51503203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46575 + ... + 47667.

It is an arithmetic number, because the mean of its divisors is an integer number (4365060).

Almost surely, 2^51503253 is an apocalyptic number.

It is an amenable number.

51503253 is a deficient number, since it is larger than the sum of its proper divisors (18337707).

51503253 is a wasteful number, since it uses less digits than its factorization.

51503253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 51503253 is about 7176.5766908743. The cubic root of 51503253 is about 372.0587764105.

Adding to 51503253 its reverse (35230515), we get a palindrome (86733768).

The spelling of 51503253 in words is "fifty-one million, five hundred three thousand, two hundred fifty-three".