51268261 has 8 divisors (see below), whose sum is σ = 56123424. Its totient is φ = 46445520.

The previous prime is 51268247. The next prime is 51268267. The reversal of 51268261 is 16286215.

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

It is not a de Polignac number, because 51268261 - 2¹⁵ = 51235493 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 (51268267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4731 + ... + 11176.

It is an arithmetic number, because the mean of its divisors is an integer number (7015428).

Almost surely, 2^51268261 is an apocalyptic number.

It is an amenable number.

51268261 is a deficient number, since it is larger than the sum of its proper divisors (4855163).

51268261 is a wasteful number, since it uses less digits than its factorization.

51268261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16211.

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

The square root of 51268261 is about 7160.1858216111. The cubic root of 51268261 is about 371.4920539774.

It can be divided in two parts, 51268 and 261, that added together give a square (51529 = 227²).

The spelling of 51268261 in words is "fifty-one million, two hundred sixty-eight thousand, two hundred sixty-one".