51813606 has 32 divisors (see below), whose sum is σ = 112720608. Its totient is φ = 15782400.

The previous prime is 51813577. The next prime is 51813613. The reversal of 51813606 is 60631815.

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, 4590 + ... + 11166.

It is an arithmetic number, because the mean of its divisors is an integer number (3522519).

Almost surely, 2^51813606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51813606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56360304).

51813606 is an abundant number, since it is smaller than the sum of its proper divisors (60907002).

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

51813606 is a wasteful number, since it uses less digits than its factorization.

51813606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6696.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 51813606 is about 7198.1668499695. The cubic root of 51813606 is about 372.8046088801.

The spelling of 51813606 in words is "fifty-one million, eight hundred thirteen thousand, six hundred six".