51135513242 has 16 divisors (see below), whose sum is σ = 84209270112. Its totient is φ = 23095366320.

The previous prime is 51135513193. The next prime is 51135513277. The reversal of 51135513242 is 24231553115.

It is a super-2 number, since 2×51135513242² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51135513199 and 51135513208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7398908 + ... + 7405815.

It is an arithmetic number, because the mean of its divisors is an integer number (5263079382).

Almost surely, 2^51135513242 is an apocalyptic number.

51135513242 is a deficient number, since it is larger than the sum of its proper divisors (33073756870).

51135513242 is a wasteful number, since it uses less digits than its factorization.

51135513242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14804893.

The product of its digits is 18000, while the sum is 32.

The spelling of 51135513242 in words is "fifty-one billion, one hundred thirty-five million, five hundred thirteen thousand, two hundred forty-two".