51103211242 has 16 divisors (see below), whose sum is σ = 79351763400. Its totient is φ = 24653816320.

The previous prime is 51103211207. The next prime is 51103211261. The reversal of 51103211242 is 24211230115.

It can be written as a sum of positive squares in 4 ways, for example, as 32385961521 + 18717249721 = 179961^2 + 136811^2 .

It is a super-2 number, since 2×51103211242² (a number of 22 digits) contains 22 as substring.

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, 211567 + ... + 383362.

Almost surely, 2^51103211242 is an apocalyptic number.

51103211242 is a deficient number, since it is larger than the sum of its proper divisors (28248552158).

51103211242 is a wasteful number, since it uses less digits than its factorization.

51103211242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596441.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 51103211242 its reverse (24211230115), we get a palindrome (75314441357).

The spelling of 51103211242 in words is "fifty-one billion, one hundred three million, two hundred eleven thousand, two hundred forty-two".