51201354550242 has 32 divisors (see below), whose sum is σ = 111350518651008. Its totient is φ = 15601308926976.

The previous prime is 51201354550217. The next prime is 51201354550271. The reversal of 51201354550242 is 24205545310215.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 51201354550242.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3186533823 + ... + 3186549890.

It is an arithmetic number, because the mean of its divisors is an integer number (3479703707844).

Almost surely, 2^{51201354550242} is an apocalyptic number.

51201354550242 is an abundant number, since it is smaller than the sum of its proper divisors (60149164100766).

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

51201354550242 is a wasteful number, since it uses less digits than its factorization.

51201354550242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6373083834.

The product of its (nonzero) digits is 240000, while the sum is 39.

Adding to 51201354550242 its reverse (24205545310215), we get a palindrome (75406899860457).

The spelling of 51201354550242 in words is "fifty-one trillion, two hundred one billion, three hundred fifty-four million, five hundred fifty thousand, two hundred forty-two".