51452152321 has 4 divisors (see below), whose sum is σ = 53226364500. Its totient is φ = 49677940144.

The previous prime is 51452152313. The next prime is 51452152337. The reversal of 51452152321 is 12325125415.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43898630400 + 7553521921 = 209520^2 + 86911^2 .

It is a cyclic number.

It is not a de Polignac number, because 51452152321 - 2³ = 51452152313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51452152021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887106046 + ... + 887106103.

It is an arithmetic number, because the mean of its divisors is an integer number (13306591125).

Almost surely, 2^51452152321 is an apocalyptic number.

It is an amenable number.

51452152321 is a deficient number, since it is larger than the sum of its proper divisors (1774212179).

51452152321 is a wasteful number, since it uses less digits than its factorization.

51452152321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774212178.

The product of its digits is 12000, while the sum is 31.

Adding to 51452152321 its reverse (12325125415), we get a palindrome (63777277736).

The spelling of 51452152321 in words is "fifty-one billion, four hundred fifty-two million, one hundred fifty-two thousand, three hundred twenty-one".