51957552 has 80 divisors (see below), whose sum is σ = 147490560. Its totient is φ = 15687936.

The previous prime is 51957551. The next prime is 51957553. The reversal of 51957552 is 25575915.

It is an interprime number because it is at equal distance from previous prime (51957551) and next prime (51957553).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 51957552.

It is not an unprimeable number, because it can be changed into a prime (51957551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19738 + ... + 22214.

It is an arithmetic number, because the mean of its divisors is an integer number (1843632).

Almost surely, 2^51957552 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 51957552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73745280).

51957552 is an abundant number, since it is smaller than the sum of its proper divisors (95533008).

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

51957552 is a wasteful number, since it uses less digits than its factorization.

51957552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530 (or 2524 counting only the distinct ones).

The product of its digits is 78750, while the sum is 39.

The square root of 51957552 is about 7208.1587107943. The cubic root of 51957552 is about 373.1495254481.

The spelling of 51957552 in words is "fifty-one million, nine hundred fifty-seven thousand, five hundred fifty-two".