51205335342 has 16 divisors (see below), whose sum is σ = 117040766592. Its totient is φ = 14630095800.

The previous prime is 51205335329. The next prime is 51205335343. The reversal of 51205335342 is 24353350215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51205335343) 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 7 ways as a sum of consecutive naturals, for example, 609587284 + ... + 609587367.

It is an arithmetic number, because the mean of its divisors is an integer number (7315047912).

Almost surely, 2^51205335342 is an apocalyptic number.

51205335342 is an abundant number, since it is smaller than the sum of its proper divisors (65835431250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51205335342 is a wasteful number, since it uses less digits than its factorization.

51205335342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219174663.

The product of its (nonzero) digits is 54000, while the sum is 33.

Adding to 51205335342 its reverse (24353350215), we get a palindrome (75558685557).

The spelling of 51205335342 in words is "fifty-one billion, two hundred five million, three hundred thirty-five thousand, three hundred forty-two".