51243543630002 has 4 divisors (see below), whose sum is σ = 76865315445006. Its totient is φ = 25621771815000.

The previous prime is 51243543629989. The next prime is 51243543630007. The reversal of 51243543630002 is 20003634534215.

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

It can be written as a sum of positive squares in only one way, i.e., 50819233395121 + 424310234881 = 7128761^2 + 651391^2 .

It is not an unprimeable number, because it can be changed into a prime (51243543630007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12810885907499 + ... + 12810885907502.

Almost surely, 2^{51243543630002} is an apocalyptic number.

51243543630002 is a deficient number, since it is larger than the sum of its proper divisors (25621771815004).

51243543630002 is a wasteful number, since it uses less digits than its factorization.

51243543630002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25621771815003.

The product of its (nonzero) digits is 259200, while the sum is 38.

The spelling of 51243543630002 in words is "fifty-one trillion, two hundred forty-three billion, five hundred forty-three million, six hundred thirty thousand, two".