51503023 has 32 divisors (see below), whose sum is σ = 63221760. Its totient is φ = 41333760.

The previous prime is 51502999. The next prime is 51503083. The reversal of 51503023 is 32030515.

It is not a de Polignac number, because 51503023 - 2¹³ = 51494831 is a prime.

It is a super-2 number, since 2×51503023² = 5305122756277058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51503083) 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 31 ways as a sum of consecutive naturals, for example, 530911 + ... + 531007.

It is an arithmetic number, because the mean of its divisors is an integer number (1975680).

Almost surely, 2^51503023 is an apocalyptic number.

51503023 is a deficient number, since it is larger than the sum of its proper divisors (11718737).

51503023 is a wasteful number, since it uses less digits than its factorization.

51503023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 51503023 is about 7176.5606665031. The cubic root of 51503023 is about 372.0582225708.

Adding to 51503023 its reverse (32030515), we get a palindrome (83533538).

The spelling of 51503023 in words is "fifty-one million, five hundred three thousand, twenty-three".