51521552 has 10 divisors (see below), whose sum is σ = 99823038. Its totient is φ = 25760768.

The previous prime is 51521551. The next prime is 51521557. The reversal of 51521552 is 25512515.

It can be written as a sum of positive squares in only one way, i.e., 35808256 + 15713296 = 5984^2 + 3964^2 .

It is not an unprimeable number, because it can be changed into a prime (51521551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610033 + ... + 1610064.

Almost surely, 2^51521552 is an apocalyptic number.

It is an amenable number.

51521552 is a deficient number, since it is larger than the sum of its proper divisors (48301486).

51521552 is a wasteful number, since it uses less digits than its factorization.

51521552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220105 (or 3220099 counting only the distinct ones).

The product of its digits is 2500, while the sum is 26.

The square root of 51521552 is about 7177.8514891296. The cubic root of 51521552 is about 372.1028350993.

The spelling of 51521552 in words is "fifty-one million, five hundred twenty-one thousand, five hundred fifty-two".