51352620 has 96 divisors (see below), whose sum is σ = 162328320. Its totient is φ = 12015360.

The previous prime is 51352571. The next prime is 51352643. The reversal of 51352620 is 2625315.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17799 + ... + 20481.

It is an arithmetic number, because the mean of its divisors is an integer number (1690920).

Almost surely, 2^51352620 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 51352620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81164160).

51352620 is an abundant number, since it is smaller than the sum of its proper divisors (110975700).

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

51352620 is a wasteful number, since it uses less digits than its factorization.

51352620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735 (or 2733 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 51352620 is about 7166.0742390796. The cubic root of 51352620 is about 371.6956986534.

Adding to 51352620 its reverse (2625315), we get a palindrome (53977935).

The spelling of 51352620 in words is "fifty-one million, three hundred fifty-two thousand, six hundred twenty".