51561352 has 8 divisors (see below), whose sum is σ = 96677550. Its totient is φ = 25780672.

The previous prime is 51561329. The next prime is 51561353. The reversal of 51561352 is 25316515.

It can be written as a sum of positive squares in only one way, i.e., 35832196 + 15729156 = 5986^2 + 3966^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 51561352.

It is not an unprimeable number, because it can be changed into a prime (51561353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222577 + ... + 3222592.

Almost surely, 2^51561352 is an apocalyptic number.

It is an amenable number.

51561352 is a deficient number, since it is larger than the sum of its proper divisors (45116198).

51561352 is a wasteful number, since it uses less digits than its factorization.

51561352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6445175 (or 6445171 counting only the distinct ones).

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

The square root of 51561352 is about 7180.6233712680. The cubic root of 51561352 is about 372.1986259573.

Adding to 51561352 its reverse (25316515), we get a palindrome (76877867).

The spelling of 51561352 in words is "fifty-one million, five hundred sixty-one thousand, three hundred fifty-two".