51259516 has 48 divisors (see below), whose sum is σ = 114250752. Its totient is φ = 19540800.

The previous prime is 51259499. The next prime is 51259529. The reversal of 51259516 is 61595215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12706 + ... + 16246.

It is an arithmetic number, because the mean of its divisors is an integer number (2380224).

Almost surely, 2^51259516 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 51259516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57125376).

51259516 is an abundant number, since it is smaller than the sum of its proper divisors (62991236).

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

51259516 is a wasteful number, since it uses less digits than its factorization.

51259516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610 (or 3608 counting only the distinct ones).

The product of its digits is 13500, while the sum is 34.

The square root of 51259516 is about 7159.5751270589. The cubic root of 51259516 is about 371.4709305593.

It can be divided in two parts, 5125 and 9516, that added together give a palindrome (14641).

The spelling of 51259516 in words is "fifty-one million, two hundred fifty-nine thousand, five hundred sixteen".