51550442122 has 4 divisors (see below), whose sum is σ = 77325663186. Its totient is φ = 25775221060.

The previous prime is 51550442107. The next prime is 51550442123. The reversal of 51550442122 is 22124405515.

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

It can be written as a sum of positive squares in only one way, i.e., 50696575281 + 853866841 = 225159^2 + 29221^2 .

It is not an unprimeable number, because it can be changed into a prime (51550442123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12887610529 + ... + 12887610532.

Almost surely, 2^51550442122 is an apocalyptic number.

51550442122 is a deficient number, since it is larger than the sum of its proper divisors (25775221064).

51550442122 is a wasteful number, since it uses less digits than its factorization.

51550442122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25775221063.

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 51550442122 its reverse (22124405515), we get a palindrome (73674847637).

The spelling of 51550442122 in words is "fifty-one billion, five hundred fifty million, four hundred forty-two thousand, one hundred twenty-two".