51321115562 has 4 divisors (see below), whose sum is σ = 76981673346. Its totient is φ = 25660557780.

The previous prime is 51321115561. The next prime is 51321115577. The reversal of 51321115562 is 26551112315.

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., 37477475281 + 13843640281 = 193591^2 + 117659^2 .

It is not an unprimeable number, because it can be changed into a prime (51321115561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12830278889 + ... + 12830278892.

Almost surely, 2^51321115562 is an apocalyptic number.

51321115562 is a deficient number, since it is larger than the sum of its proper divisors (25660557784).

51321115562 is a wasteful number, since it uses less digits than its factorization.

51321115562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25660557783.

The product of its digits is 9000, while the sum is 32.

Adding to 51321115562 its reverse (26551112315), we get a palindrome (77872227877).

The spelling of 51321115562 in words is "fifty-one billion, three hundred twenty-one million, one hundred fifteen thousand, five hundred sixty-two".