51070620220651 has 4 divisors (see below), whose sum is σ = 51070641349392. Its totient is φ = 51070599091912.

The previous prime is 51070620220619. The next prime is 51070620220657. The reversal of 51070620220651 is 15602202607015.

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

It is a cyclic number.

It is not a de Polignac number, because 51070620220651 - 2⁵ = 51070620220619 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 51070620220651.

It is not an unprimeable number, because it can be changed into a prime (51070620220657) 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, 6388480 + ... + 11956333.

It is an arithmetic number, because the mean of its divisors is an integer number (12767660337348).

Almost surely, 2^{51070620220651} is an apocalyptic number.

51070620220651 is a deficient number, since it is larger than the sum of its proper divisors (21128741).

51070620220651 is a wasteful number, since it uses less digits than its factorization.

51070620220651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21128740.

The product of its (nonzero) digits is 50400, while the sum is 37.

Adding to 51070620220651 its reverse (15602202607015), we get a palindrome (66672822827666).

The spelling of 51070620220651 in words is "fifty-one trillion, seventy billion, six hundred twenty million, two hundred twenty thousand, six hundred fifty-one".