51081726 has 16 divisors (see below), whose sum is σ = 102326400. Its totient is φ = 17000088.

The previous prime is 51081703. The next prime is 51081727. The reversal of 51081726 is 62718015.

It is a super-2 number, since 2×51081726² = 5218685462278152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51081693 and 51081702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51081727) 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, 2506 + ... + 10413.

It is an arithmetic number, because the mean of its divisors is an integer number (6395400).

Almost surely, 2^51081726 is an apocalyptic number.

51081726 is an abundant number, since it is smaller than the sum of its proper divisors (51244674).

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

51081726 is a wasteful number, since it uses less digits than its factorization.

51081726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13583.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 51081726 is about 7147.1481025651. The cubic root of 51081726 is about 371.0409595316.

The spelling of 51081726 in words is "fifty-one million, eighty-one thousand, seven hundred twenty-six".