51305552 has 10 divisors (see below), whose sum is σ = 99404538. Its totient is φ = 25652768.

The previous prime is 51305539. The next prime is 51305591. The reversal of 51305552 is 25550315.

It can be written as a sum of positive squares in only one way, i.e., 47831056 + 3474496 = 6916^2 + 1864^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1603283 + ... + 1603314.

Almost surely, 2^51305552 is an apocalyptic number.

It is an amenable number.

51305552 is a deficient number, since it is larger than the sum of its proper divisors (48098986).

51305552 is a wasteful number, since it uses less digits than its factorization.

51305552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206605 (or 3206599 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 51305552 is about 7162.7894007851. The cubic root of 51305552 is about 371.5821028851.

Adding to 51305552 its reverse (25550315), we get a palindrome (76855867).

The spelling of 51305552 in words is "fifty-one million, three hundred five thousand, five hundred fifty-two".