51620352 has 80 divisors (see below), whose sum is σ = 157198272. Its totient is φ = 14745600.

The previous prime is 51620341. The next prime is 51620369. The reversal of 51620352 is 25302615.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8352 + ... + 13152.

Almost surely, 2^51620352 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 51620352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78599136).

51620352 is an abundant number, since it is smaller than the sum of its proper divisors (105577920).

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

51620352 is an equidigital number, since it uses as much as digits as its factorization.

51620352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4829 (or 4813 counting only the distinct ones).

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

The square root of 51620352 is about 7184.7304751118. The cubic root of 51620352 is about 372.3405368231.

Adding to 51620352 its reverse (25302615), we get a palindrome (76922967).

The spelling of 51620352 in words is "fifty-one million, six hundred twenty thousand, three hundred fifty-two".