51005120511 has 16 divisors (see below), whose sum is σ = 70429564800. Its totient is φ = 32794634208.

The previous prime is 51005120501. The next prime is 51005120531. The reversal of 51005120511 is 11502150015.

It is not a de Polignac number, because 51005120511 - 2⁶ = 51005120447 is a prime.

It is a super-2 number, since 2×51005120511² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51005120501) 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, 244281 + ... + 402098.

It is an arithmetic number, because the mean of its divisors is an integer number (4401847800).

Almost surely, 2^51005120511 is an apocalyptic number.

51005120511 is a deficient number, since it is larger than the sum of its proper divisors (19424444289).

51005120511 is a wasteful number, since it uses less digits than its factorization.

51005120511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647318.

The product of its (nonzero) digits is 250, while the sum is 21.

Adding to 51005120511 its reverse (11502150015), we get a palindrome (62507270526).

The spelling of 51005120511 in words is "fifty-one billion, five million, one hundred twenty thousand, five hundred eleven".