51161724 has 18 divisors (see below), whose sum is σ = 129325560. Its totient is φ = 17053896.

The previous prime is 51161707. The next prime is 51161731. The reversal of 51161724 is 42716115.

It is a happy number.

51161724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

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, 710544 + ... + 710615.

Almost surely, 2^51161724 is an apocalyptic number.

It is an amenable number.

51161724 is an abundant number, since it is smaller than the sum of its proper divisors (78163836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51161724 is a wasteful number, since it uses less digits than its factorization.

51161724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421169 (or 1421164 counting only the distinct ones).

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

The square root of 51161724 is about 7152.7424111316. The cubic root of 51161724 is about 371.2345516137.

Adding to 51161724 its reverse (42716115), we get a palindrome (93877839).

The spelling of 51161724 in words is "fifty-one million, one hundred sixty-one thousand, seven hundred twenty-four".