51095540 has 48 divisors (see below), whose sum is σ = 115359552. Its totient is φ = 18940416.

The previous prime is 51095537. The next prime is 51095543. The reversal of 51095540 is 4559015.

It is an interprime number because it is at equal distance from previous prime (51095537) and next prime (51095543).

It is a super-2 number, since 2×51095540² = 5221508415783200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51095543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21659 + ... + 23901.

It is an arithmetic number, because the mean of its divisors is an integer number (2403324).

Almost surely, 2^51095540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51095540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57679776).

51095540 is an abundant number, since it is smaller than the sum of its proper divisors (64264012).

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

51095540 is a wasteful number, since it uses less digits than its factorization.

51095540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336 (or 2334 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 51095540 is about 7148.1144366889. The cubic root of 51095540 is about 371.0744033105.

The spelling of 51095540 in words is "fifty-one million, ninety-five thousand, five hundred forty".