51503434 has 4 divisors (see below), whose sum is σ = 77255154. Its totient is φ = 25751716.

The previous prime is 51503429. The next prime is 51503437. The reversal of 51503434 is 43430515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43430515 = 5 ⋅8686103.

It can be written as a sum of positive squares in only one way, i.e., 26553409 + 24950025 = 5153^2 + 4995^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51503399 and 51503408.

It is not an unprimeable number, because it can be changed into a prime (51503437) 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 as a sum of consecutive naturals, namely, 12875857 + ... + 12875860.

Almost surely, 2^51503434 is an apocalyptic number.

51503434 is a deficient number, since it is larger than the sum of its proper divisors (25751720).

51503434 is a wasteful number, since it uses less digits than its factorization.

51503434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25751719.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 51503434 is about 7176.5893013325. The cubic root of 51503434 is about 372.0592122572.

Adding to 51503434 its reverse (43430515), we get a palindrome (94933949).

The spelling of 51503434 in words is "fifty-one million, five hundred three thousand, four hundred thirty-four".