51504125211 has 128 divisors (see below), whose sum is σ = 96915947520. Its totient is φ = 26257996800.

The previous prime is 51504125209. The next prime is 51504125249. The reversal of 51504125211 is 11252140515.

It is a happy number.

51504125211 is a `hidden beast` number, since 51 + 50 + 41 + 2 + 521 + 1 = 666.

It is not a de Polignac number, because 51504125211 - 2¹ = 51504125209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51504125411) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 25610196 + ... + 25612206.

It is an arithmetic number, because the mean of its divisors is an integer number (757155840).

Almost surely, 2^51504125211 is an apocalyptic number.

51504125211 is a deficient number, since it is larger than the sum of its proper divisors (45411822309).

51504125211 is a wasteful number, since it uses less digits than its factorization.

51504125211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262 (or 2256 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

Adding to 51504125211 its reverse (11252140515), we get a palindrome (62756265726).

It can be divided in two parts, 51504 and 125211, that added together give a triangular number (176715 = T₅₉₄).

The spelling of 51504125211 in words is "fifty-one billion, five hundred four million, one hundred twenty-five thousand, two hundred eleven".