51456222442 has 16 divisors (see below), whose sum is σ = 79862725800. Its totient is φ = 24835688640.

The previous prime is 51456222431. The next prime is 51456222451. The reversal of 51456222442 is 24422265415.

It can be written as a sum of positive squares in 4 ways, for example, as 47375440281 + 4080782161 = 217659^2 + 63881^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190684 + ... + 373192.

Almost surely, 2^51456222442 is an apocalyptic number.

51456222442 is a deficient number, since it is larger than the sum of its proper divisors (28406503358).

51456222442 is a wasteful number, since it uses less digits than its factorization.

51456222442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187401.

The product of its digits is 153600, while the sum is 37.

Adding to 51456222442 its reverse (24422265415), we get a palindrome (75878487857).

The spelling of 51456222442 in words is "fifty-one billion, four hundred fifty-six million, two hundred twenty-two thousand, four hundred forty-two".