51220070571 has 16 divisors (see below), whose sum is σ = 70583685120. Its totient is φ = 33004311360.

The previous prime is 51220070549. The next prime is 51220070597. The reversal of 51220070571 is 17507002215.

It is not a de Polignac number, because 51220070571 - 2¹³ = 51220062379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51220070071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265155 + ... + 415628.

It is an arithmetic number, because the mean of its divisors is an integer number (4411480320).

Almost surely, 2^51220070571 is an apocalyptic number.

51220070571 is a deficient number, since it is larger than the sum of its proper divisors (19363614549).

51220070571 is a wasteful number, since it uses less digits than its factorization.

51220070571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681626.

The product of its (nonzero) digits is 4900, while the sum is 30.

Adding to 51220070571 its reverse (17507002215), we get a palindrome (68727072786).

The spelling of 51220070571 in words is "fifty-one billion, two hundred twenty million, seventy thousand, five hundred seventy-one".