51261268 has 6 divisors (see below), whose sum is σ = 89707226. Its totient is φ = 25630632.

The previous prime is 51261263. The next prime is 51261277. The reversal of 51261268 is 86216215.

51261268 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., 33385284 + 17875984 = 5778^2 + 4228^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51261263) 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, 6407655 + ... + 6407662.

Almost surely, 2^51261268 is an apocalyptic number.

It is an amenable number.

51261268 is a deficient number, since it is larger than the sum of its proper divisors (38445958).

51261268 is a wasteful number, since it uses less digits than its factorization.

51261268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12815321 (or 12815319 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 51261268 is about 7159.6974796426. The cubic root of 51261268 is about 371.4751626818.

It can be divided in two parts, 51261 and 268, that added together give a square (51529 = 227²).

The spelling of 51261268 in words is "fifty-one million, two hundred sixty-one thousand, two hundred sixty-eight".