51144560 has 20 divisors (see below), whose sum is σ = 118911288. Its totient is φ = 20457792.

The previous prime is 51144539. The next prime is 51144581. The reversal of 51144560 is 6544115.

It is an interprime number because it is at equal distance from previous prime (51144539) and next prime (51144581).

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319574 + ... + 319733.

Almost surely, 2^51144560 is an apocalyptic number.

It is an amenable number.

51144560 is an abundant number, since it is smaller than the sum of its proper divisors (67766728).

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

51144560 is a wasteful number, since it uses less digits than its factorization.

51144560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639320 (or 639314 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 51144560 is about 7151.5424909596. The cubic root of 51144560 is about 371.1930324074.

Adding to 51144560 its reverse (6544115), we get a palindrome (57688675).

The spelling of 51144560 in words is "fifty-one million, one hundred forty-four thousand, five hundred sixty".