51563512 has 128 divisors (see below), whose sum is σ = 133539840. Its totient is φ = 18017280.

The previous prime is 51563507. The next prime is 51563521. The reversal of 51563512 is 21536515.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 376308 + ... + 376444.

It is an arithmetic number, because the mean of its divisors is an integer number (1043280).

Almost surely, 2^51563512 is an apocalyptic number.

51563512 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51563512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66769920).

51563512 is an abundant number, since it is smaller than the sum of its proper divisors (81976328).

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

51563512 is a wasteful number, since it uses less digits than its factorization.

51563512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 217 counting only the distinct ones).

The product of its digits is 4500, while the sum is 28.

The square root of 51563512 is about 7180.7737744619. The cubic root of 51563512 is about 372.2038232467.

It can be divided in two parts, 5156 and 3512, that added together give a palindrome (8668).

The spelling of 51563512 in words is "fifty-one million, five hundred sixty-three thousand, five hundred twelve".