51172461 has 6 divisors (see below), whose sum is σ = 73915790. Its totient is φ = 34114968.

The previous prime is 51172441. The next prime is 51172477. The reversal of 51172461 is 16427115.

It is a happy number.

51172461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 28419561 + 22752900 = 5331^2 + 4770^2 .

It is not a de Polignac number, because 51172461 - 2⁷ = 51172333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51172421) 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 5 ways as a sum of consecutive naturals, for example, 2842906 + ... + 2842923.

Almost surely, 2^51172461 is an apocalyptic number.

It is an amenable number.

51172461 is a deficient number, since it is larger than the sum of its proper divisors (22743329).

51172461 is a wasteful number, since it uses less digits than its factorization.

51172461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5685835 (or 5685832 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 51172461 is about 7153.4929230412. The cubic root of 51172461 is about 371.2605193768.

Adding to 51172461 its reverse (16427115), we get a palindrome (67599576).

The spelling of 51172461 in words is "fifty-one million, one hundred seventy-two thousand, four hundred sixty-one".