51220251334 has 32 divisors (see below), whose sum is σ = 88386794496. Its totient is φ = 21806638560.

The previous prime is 51220251331. The next prime is 51220251349. The reversal of 51220251334 is 43315202215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51220251331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2439927 + ... + 2460829.

It is an arithmetic number, because the mean of its divisors is an integer number (2762087328).

Almost surely, 2^51220251334 is an apocalyptic number.

51220251334 is a deficient number, since it is larger than the sum of its proper divisors (37166543162).

51220251334 is a wasteful number, since it uses less digits than its factorization.

51220251334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22060.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 51220251334 its reverse (43315202215), we get a palindrome (94535453549).

The spelling of 51220251334 in words is "fifty-one billion, two hundred twenty million, two hundred fifty-one thousand, three hundred thirty-four".