51135342004 has 6 divisors (see below), whose sum is σ = 89486848514. Its totient is φ = 25567671000.

The previous prime is 51135341977. The next prime is 51135342017. The reversal of 51135342004 is 40024353115.

It can be written as a sum of positive squares in only one way, i.e., 29261523600 + 21873818404 = 171060^2 + 147898^2 .

It is a super-2 number, since 2×51135342004² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6391917747 + ... + 6391917754.

Almost surely, 2^51135342004 is an apocalyptic number.

It is an amenable number.

51135342004 is a deficient number, since it is larger than the sum of its proper divisors (38351506510).

51135342004 is a wasteful number, since it uses less digits than its factorization.

51135342004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12783835505 (or 12783835503 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 51135342004 its reverse (40024353115), we get a palindrome (91159695119).

The spelling of 51135342004 in words is "fifty-one billion, one hundred thirty-five million, three hundred forty-two thousand, four".