51212474 has 4 divisors (see below), whose sum is σ = 76818714. Its totient is φ = 25606236.

The previous prime is 51212471. The next prime is 51212479. The reversal of 51212474 is 47421215.

51212474 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28697449 + 22515025 = 5357^2 + 4745^2 .

It is not an unprimeable number, because it can be changed into a prime (51212471) 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 as a sum of consecutive naturals, namely, 12803117 + ... + 12803120.

Almost surely, 2^51212474 is an apocalyptic number.

51212474 is a deficient number, since it is larger than the sum of its proper divisors (25606240).

51212474 is a wasteful number, since it uses less digits than its factorization.

51212474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25606239.

The product of its digits is 2240, while the sum is 26.

The square root of 51212474 is about 7156.2891221638. The cubic root of 51212474 is about 371.3572600628.

Adding to 51212474 its reverse (47421215), we get a palindrome (98633689).

The spelling of 51212474 in words is "fifty-one million, two hundred twelve thousand, four hundred seventy-four".