51135420014247 has 16 divisors (see below), whose sum is σ = 72363475215360. Its totient is φ = 32008394301312.

The previous prime is 51135420014243. The next prime is 51135420014257. The reversal of 51135420014247 is 74241002453115.

It is a happy number.

It is not a de Polignac number, because 51135420014247 - 2² = 51135420014243 is a prime.

It is a super-2 number, since 2×51135420014247² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51135420014243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1196464663 + ... + 1196507400.

It is an arithmetic number, because the mean of its divisors is an integer number (4522717200960).

Almost surely, 2^{51135420014247} is an apocalyptic number.

51135420014247 is a deficient number, since it is larger than the sum of its proper divisors (21228055201113).

51135420014247 is a wasteful number, since it uses less digits than its factorization.

51135420014247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392972502.

The product of its (nonzero) digits is 134400, while the sum is 39.

The spelling of 51135420014247 in words is "fifty-one trillion, one hundred thirty-five billion, four hundred twenty million, fourteen thousand, two hundred forty-seven".