51662327620251 has 4 divisors (see below), whose sum is σ = 68883103493672. Its totient is φ = 34441551746832.

The previous prime is 51662327620133. The next prime is 51662327620259. The reversal of 51662327620251 is 15202672326615.

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

It is not a de Polignac number, because 51662327620251 - 2³⁹ = 51112571806363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51662327620251.

It is not an unprimeable number, because it can be changed into a prime (51662327620259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8610387936706 + ... + 8610387936711.

It is an arithmetic number, because the mean of its divisors is an integer number (17220775873418).

Almost surely, 2^{51662327620251} is an apocalyptic number.

51662327620251 is a deficient number, since it is larger than the sum of its proper divisors (17220775873421).

51662327620251 is a wasteful number, since it uses less digits than its factorization.

51662327620251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17220775873420.

The product of its (nonzero) digits is 1814400, while the sum is 48.

Adding to 51662327620251 its reverse (15202672326615), we get a palindrome (66864999946866).

The spelling of 51662327620251 in words is "fifty-one trillion, six hundred sixty-two billion, three hundred twenty-seven million, six hundred twenty thousand, two hundred fifty-one".