51261695 has 8 divisors (see below), whose sum is σ = 62357136. Its totient is φ = 40447296.

The previous prime is 51261673. The next prime is 51261697. The reversal of 51261695 is 59616215.

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 51261695 - 2¹² = 51257599 is a prime.

It is a super-2 number, since 2×51261695² = 5255522748546050, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51261697) 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, 69857 + ... + 70586.

It is an arithmetic number, because the mean of its divisors is an integer number (7794642).

Almost surely, 2^51261695 is an apocalyptic number.

51261695 is a deficient number, since it is larger than the sum of its proper divisors (11095441).

51261695 is a wasteful number, since it uses less digits than its factorization.

51261695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140521.

The product of its digits is 16200, while the sum is 35.

The square root of 51261695 is about 7159.7272992761. The cubic root of 51261695 is about 371.4761941263.

The spelling of 51261695 in words is "fifty-one million, two hundred sixty-one thousand, six hundred ninety-five".