51172552 has 8 divisors (see below), whose sum is σ = 95948550. Its totient is φ = 25586272.

The previous prime is 51172549. The next prime is 51172553. The reversal of 51172552 is 25527115.

It can be written as a sum of positive squares in only one way, i.e., 46703556 + 4468996 = 6834^2 + 2114^2 .

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 51172552.

It is not an unprimeable number, because it can be changed into a prime (51172553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3198277 + ... + 3198292.

Almost surely, 2^51172552 is an apocalyptic number.

It is an amenable number.

51172552 is a deficient number, since it is larger than the sum of its proper divisors (44775998).

51172552 is a wasteful number, since it uses less digits than its factorization.

51172552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6396575 (or 6396571 counting only the distinct ones).

The product of its digits is 3500, while the sum is 28.

The square root of 51172552 is about 7153.4992835674. The cubic root of 51172552 is about 371.2607394476.

Adding to 51172552 its reverse (25527115), we get a palindrome (76699667).

The spelling of 51172552 in words is "fifty-one million, one hundred seventy-two thousand, five hundred fifty-two".