51503963 has 16 divisors (see below), whose sum is σ = 61753344. Its totient is φ = 42029280.

The previous prime is 51503957. The next prime is 51503983. The reversal of 51503963 is 36930515.

It is not a de Polignac number, because 51503963 - 2¹⁸ = 51241819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51503953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10058 + ... + 14288.

It is an arithmetic number, because the mean of its divisors is an integer number (3859584).

Almost surely, 2^51503963 is an apocalyptic number.

51503963 is a deficient number, since it is larger than the sum of its proper divisors (10249381).

51503963 is a wasteful number, since it uses less digits than its factorization.

51503963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4322.

The product of its (nonzero) digits is 12150, while the sum is 32.

The square root of 51503963 is about 7176.6261571856. The cubic root of 51503963 is about 372.0604860794.

The spelling of 51503963 in words is "fifty-one million, five hundred three thousand, nine hundred sixty-three".