51504245252 has 12 divisors (see below), whose sum is σ = 90790331100. Its totient is φ = 25564150656.

The previous prime is 51504245213. The next prime is 51504245333. The reversal of 51504245252 is 25254240515.

It can be written as a sum of positive squares in 2 ways, for example, as 43938028996 + 7566216256 = 209614^2 + 86984^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46992377 + ... + 46993472.

It is an arithmetic number, because the mean of its divisors is an integer number (7565860925).

Almost surely, 2^51504245252 is an apocalyptic number.

It is an amenable number.

51504245252 is a deficient number, since it is larger than the sum of its proper divisors (39286085848).

51504245252 is a wasteful number, since it uses less digits than its factorization.

51504245252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93985990 (or 93985988 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 35.

Adding to 51504245252 its reverse (25254240515), we get a palindrome (76758485767).

The spelling of 51504245252 in words is "fifty-one billion, five hundred four million, two hundred forty-five thousand, two hundred fifty-two".