51490560 has 288 divisors, whose sum is σ = 190729728. Its totient is φ = 11714560.

The previous prime is 51490531. The next prime is 51490577. The reversal of 51490560 is 6509415.

It is a super-2 number, since 2×51490560² = 5302555538227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 971494 + ... + 971546.

It is an arithmetic number, because the mean of its divisors is an integer number (662256).

Almost surely, 2^51490560 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 51490560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95364864).

51490560 is an abundant number, since it is smaller than the sum of its proper divisors (139239168).

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

51490560 is a wasteful number, since it uses less digits than its factorization.

51490560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 51490560 is about 7175.6923010954. The cubic root of 51490560 is about 372.0282092147.

Adding to 51490560 its reverse (6509415), we get a palindrome (57999975).

The spelling of 51490560 in words is "fifty-one million, four hundred ninety thousand, five hundred sixty".