51168949 has 8 divisors (see below), whose sum is σ = 55203512. Its totient is φ = 47148480.

The previous prime is 51168913. The next prime is 51168961. The reversal of 51168949 is 94986115.

51168949 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 4 ways, for example, as 3972049 + 47196900 = 1993^2 + 6870^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51168949 - 2⁹ = 51168437 is a prime.

It is a super-2 number, since 2×51168949² = 5236522683529202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51168979) 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 7 ways as a sum of consecutive naturals, for example, 4759 + ... + 11179.

It is an arithmetic number, because the mean of its divisors is an integer number (6900439).

Almost surely, 2^51168949 is an apocalyptic number.

It is an amenable number.

51168949 is a deficient number, since it is larger than the sum of its proper divisors (4034563).

51168949 is a wasteful number, since it uses less digits than its factorization.

51168949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7047.

The product of its digits is 77760, while the sum is 43.

The square root of 51168949 is about 7153.2474443430. The cubic root of 51168949 is about 371.2520258971.

The spelling of 51168949 in words is "fifty-one million, one hundred sixty-eight thousand, nine hundred forty-nine".