51015726 has 24 divisors (see below), whose sum is σ = 113231664. Its totient is φ = 16590240.

The previous prime is 51015721. The next prime is 51015749. The reversal of 51015726 is 62751015.

It is a super-5 number, since 5×51015726⁵ (a number of 40 digits) contains 55555 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51015726.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51015721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33826 + ... + 35301.

It is an arithmetic number, because the mean of its divisors is an integer number (4717986).

Almost surely, 2^51015726 is an apocalyptic number.

51015726 is an abundant number, since it is smaller than the sum of its proper divisors (62215938).

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

51015726 is a wasteful number, since it uses less digits than its factorization.

51015726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69176 (or 69173 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 51015726 is about 7142.5293839088. The cubic root of 51015726 is about 370.8810898504.

The spelling of 51015726 in words is "fifty-one million, fifteen thousand, seven hundred twenty-six".