51135443422 has 48 divisors (see below), whose sum is σ = 89840499840. Its totient is φ = 21764635200.

The previous prime is 51135443371. The next prime is 51135443431. The reversal of 51135443422 is 22434453115.

It is a super-2 number, since 2×51135443422² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17576904 + ... + 17579812.

It is an arithmetic number, because the mean of its divisors is an integer number (1871677080).

Almost surely, 2^51135443422 is an apocalyptic number.

51135443422 is a deficient number, since it is larger than the sum of its proper divisors (38705056418).

51135443422 is a wasteful number, since it uses less digits than its factorization.

51135443422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097 (or 4090 counting only the distinct ones).

The product of its digits is 57600, while the sum is 34.

Adding to 51135443422 its reverse (22434453115), we get a palindrome (73569896537).

The spelling of 51135443422 in words is "fifty-one billion, one hundred thirty-five million, four hundred forty-three thousand, four hundred twenty-two".