51662326620251 has 8 divisors (see below), whose sum is σ = 52370326637280. Its totient is φ = 50954334628032.

The previous prime is 51662326620199. The next prime is 51662326620257. The reversal of 51662326620251 is 15202662326615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51662326620251 - 2³⁰ = 51661252878427 is a prime.

It is a super-2 number, since 2×51662326620251² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51662326620196 and 51662326620205.

It is not an unprimeable number, because it can be changed into a prime (51662326620257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11584205 + ... + 15411633.

It is an arithmetic number, because the mean of its divisors is an integer number (6546290829660).

Almost surely, 2^{51662326620251} is an apocalyptic number.

51662326620251 is a deficient number, since it is larger than the sum of its proper divisors (708000017029).

51662326620251 is a wasteful number, since it uses less digits than its factorization.

51662326620251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4012405.

The product of its (nonzero) digits is 1555200, while the sum is 47.

Adding to 51662326620251 its reverse (15202662326615), we get a palindrome (66864988946866).

The spelling of 51662326620251 in words is "fifty-one trillion, six hundred sixty-two billion, three hundred twenty-six million, six hundred twenty thousand, two hundred fifty-one".