51442560 has 256 divisors, whose sum is σ = 197064000. Its totient is φ = 12607488.

The previous prime is 51442511. The next prime is 51442579. The reversal of 51442560 is 6524415.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 224526 + ... + 224754.

Almost surely, 2^51442560 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 51442560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98532000).

51442560 is an abundant number, since it is smaller than the sum of its proper divisors (145621440).

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

51442560 is a wasteful number, since it uses less digits than its factorization.

51442560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 51442560 is about 7172.3468962398. The cubic root of 51442560 is about 371.9125705044.

Adding to 51442560 its reverse (6524415), we get a palindrome (57966975).

The spelling of 51442560 in words is "fifty-one million, four hundred forty-two thousand, five hundred sixty".