51563040 has 192 divisors, whose sum is σ = 176359680. Its totient is φ = 12615680.

The previous prime is 51563021. The next prime is 51563047. The reversal of 51563040 is 4036515.

It is a super-4 number, since 4×51563040⁴ (a number of 32 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 51563040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51563047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 579316 + ... + 579404.

It is an arithmetic number, because the mean of its divisors is an integer number (918540).

Almost surely, 2^51563040 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 51563040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88179840).

51563040 is an abundant number, since it is smaller than the sum of its proper divisors (124796640).

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

51563040 is a wasteful number, since it uses less digits than its factorization.

51563040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 51563040 is about 7180.7409088478. The cubic root of 51563040 is about 372.2026875551.

Adding to 51563040 its reverse (4036515), we get a palindrome (55599555).

The spelling of 51563040 in words is "fifty-one million, five hundred sixty-three thousand, forty".