51560064 has 80 divisors (see below), whose sum is σ = 153472770. Its totient is φ = 17183232.

The previous prime is 51560023. The next prime is 51560101. The reversal of 51560064 is 46006515.

It is a happy number.

51560064 is a `hidden beast` number, since 51 + 5 + 600 + 6 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 41062464 + 10497600 = 6408^2 + 3240^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7882 + ... + 12854.

Almost surely, 2^51560064 is an apocalyptic number.

51560064 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51560064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76736385).

51560064 is an abundant number, since it is smaller than the sum of its proper divisors (101912706).

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

51560064 is an equidigital number, since it uses as much as digits as its factorization.

51560064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4999 (or 4978 counting only the distinct ones).

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

The square root of 51560064 is about 7180.5336849011. The cubic root of 51560064 is about 372.1955267638.

Adding to 51560064 its reverse (46006515), we get a palindrome (97566579).

The spelling of 51560064 in words is "fifty-one million, five hundred sixty thousand, sixty-four".