51121503 has 16 divisors (see below), whose sum is σ = 76243200. Its totient is φ = 33852600.

The previous prime is 51121501. The next prime is 51121507. The reversal of 51121503 is 30512115.

51121503 is a `hidden beast` number, since 511 + 2 + 150 + 3 = 666.

51121503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51121503 - 2¹ = 51121501 is a prime.

It is a super-2 number, since 2×51121503² = 5226816137958018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51121501) 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 15 ways as a sum of consecutive naturals, for example, 2193 + ... + 10346.

It is an arithmetic number, because the mean of its divisors is an integer number (4765200).

Almost surely, 2^51121503 is an apocalyptic number.

51121503 is a deficient number, since it is larger than the sum of its proper divisors (25121697).

51121503 is a wasteful number, since it uses less digits than its factorization.

51121503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12699 (or 12693 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 51121503 is about 7149.9302793804. The cubic root of 51121503 is about 371.1372435858.

Adding to 51121503 its reverse (30512115), we get a palindrome (81633618).

The spelling of 51121503 in words is "fifty-one million, one hundred twenty-one thousand, five hundred three".