51521064 has 64 divisors (see below), whose sum is σ = 149255040. Its totient is φ = 14515200.

The previous prime is 51521021. The next prime is 51521077. The reversal of 51521064 is 46012515.

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 15 ways as a sum of consecutive naturals, for example, 10164 + ... + 14364.

It is an arithmetic number, because the mean of its divisors is an integer number (2332110).

Almost surely, 2^51521064 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 51521064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74627520).

51521064 is an abundant number, since it is smaller than the sum of its proper divisors (97733976).

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

51521064 is a wasteful number, since it uses less digits than its factorization.

51521064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290 (or 4286 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 51521064 is about 7177.8174955901. The cubic root of 51521064 is about 372.1016602721.

Adding to 51521064 its reverse (46012515), we get a palindrome (97533579).

It can be divided in two parts, 5152 and 1064, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 51521064 in words is "fifty-one million, five hundred twenty-one thousand, sixty-four".