51620652 has 60 divisors (see below), whose sum is σ = 136299240. Its totient is φ = 17034624.

The previous prime is 51620651. The next prime is 51620659. The reversal of 51620652 is 25602615.

51620652 is a `hidden beast` number, since 5 + 1 + 6 + 2 + 0 + 652 = 666.

51620652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51620651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33924 + ... + 35412.

It is an arithmetic number, because the mean of its divisors is an integer number (2271654).

Almost surely, 2^51620652 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 51620652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68149620).

51620652 is an abundant number, since it is smaller than the sum of its proper divisors (84678588).

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

51620652 is a wasteful number, since it uses less digits than its factorization.

51620652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612 (or 1601 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 51620652 is about 7184.7513526913. The cubic root of 51620652 is about 372.3412581274.

The spelling of 51620652 in words is "fifty-one million, six hundred twenty thousand, six hundred fifty-two".