51813486 has 32 divisors (see below), whose sum is σ = 116445600. Its totient is φ = 17075520.

The previous prime is 51813479. The next prime is 51813491. The reversal of 51813486 is 68431815.

51813486 is a `hidden beast` number, since 518 + 134 + 8 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 51813486.

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, 585 + ... + 10196.

It is an arithmetic number, because the mean of its divisors is an integer number (3638925).

Almost surely, 2^51813486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51813486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58222800).

51813486 is an abundant number, since it is smaller than the sum of its proper divisors (64632114).

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

51813486 is a wasteful number, since it uses less digits than its factorization.

51813486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10881 (or 10875 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 51813486 is about 7198.1585145091. The cubic root of 51813486 is about 372.8043210754.

The spelling of 51813486 in words is "fifty-one million, eight hundred thirteen thousand, four hundred eighty-six".