51505100211 has 16 divisors (see below), whose sum is σ = 69609640320. Its totient is φ = 33871528320.

The previous prime is 51505100189. The next prime is 51505100219. The reversal of 51505100211 is 11200150515.

It is not a de Polignac number, because 51505100211 - 2¹³ = 51505092019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51505100219) 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, 288501 + ... + 431558.

It is an arithmetic number, because the mean of its divisors is an integer number (4350602520).

Almost surely, 2^51505100211 is an apocalyptic number.

51505100211 is a deficient number, since it is larger than the sum of its proper divisors (18104540109).

51505100211 is a wasteful number, since it uses less digits than its factorization.

51505100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720386.

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

Adding to 51505100211 its reverse (11200150515), we get a palindrome (62705250726).

The spelling of 51505100211 in words is "fifty-one billion, five hundred five million, one hundred thousand, two hundred eleven".