51150720 has 64 divisors (see below), whose sum is σ = 163049040. Its totient is φ = 13639680.

The previous prime is 51150709. The next prime is 51150721. The reversal of 51150720 is 2705115.

It is a tau number, because it is divible by the number of its divisors (64).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51150721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11401 + ... + 15240.

Almost surely, 2^51150720 is an apocalyptic number.

It is an amenable number.

51150720 is an abundant number, since it is smaller than the sum of its proper divisors (111898320).

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

51150720 is a wasteful number, since it uses less digits than its factorization.

51150720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26663 (or 26651 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 51150720 is about 7151.9731543120. The cubic root of 51150720 is about 371.2079343330.

Adding to 51150720 its reverse (2705115), we get a palindrome (53855835).

The spelling of 51150720 in words is "fifty-one million, one hundred fifty thousand, seven hundred twenty".