51240425135 has 32 divisors (see below), whose sum is σ = 67158020160. Its totient is φ = 37373847552.

The previous prime is 51240425113. The next prime is 51240425141. The reversal of 51240425135 is 53152404215.

It is a cyclic number.

It is not a de Polignac number, because 51240425135 - 2¹⁰ = 51240424111 is a prime.

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 in 31 ways as a sum of consecutive naturals, for example, 684632 + ... + 755778.

It is an arithmetic number, because the mean of its divisors is an integer number (2098688130).

Almost surely, 2^51240425135 is an apocalyptic number.

51240425135 is a deficient number, since it is larger than the sum of its proper divisors (15917595025).

51240425135 is a wasteful number, since it uses less digits than its factorization.

51240425135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71435.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 51240425135 in words is "fifty-one billion, two hundred forty million, four hundred twenty-five thousand, one hundred thirty-five".