51632780 has 12 divisors (see below), whose sum is σ = 108428880. Its totient is φ = 20653104.

The previous prime is 51632771. The next prime is 51632783. The reversal of 51632780 is 8723615.

It is a happy number.

51632780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51632783) 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 3 ways as a sum of consecutive naturals, for example, 1290800 + ... + 1290839.

It is an arithmetic number, because the mean of its divisors is an integer number (9035740).

Almost surely, 2^51632780 is an apocalyptic number.

It is an amenable number.

51632780 is an abundant number, since it is smaller than the sum of its proper divisors (56796100).

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

51632780 is a wasteful number, since it uses less digits than its factorization.

51632780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581648 (or 2581646 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 51632780 is about 7185.5953128464. The cubic root of 51632780 is about 372.3704157159.

The spelling of 51632780 in words is "fifty-one million, six hundred thirty-two thousand, seven hundred eighty".