51025523211 has 56 divisors (see below), whose sum is σ = 83549654496. Its totient is φ = 30957655680.

The previous prime is 51025523203. The next prime is 51025523249. The reversal of 51025523211 is 11232552015.

51025523211 is a `hidden beast` number, since 5 + 102 + 552 + 3 + 2 + 1 + 1 = 666.

It is not a de Polignac number, because 51025523211 - 2³ = 51025523203 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 (51025523111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 634951 + ... + 710783.

It is an arithmetic number, because the mean of its divisors is an integer number (1491958116).

Almost surely, 2^51025523211 is an apocalyptic number.

51025523211 is a deficient number, since it is larger than the sum of its proper divisors (32524131285).

51025523211 is an equidigital number, since it uses as much as digits as its factorization.

51025523211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75935 (or 75920 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The spelling of 51025523211 in words is "fifty-one billion, twenty-five million, five hundred twenty-three thousand, two hundred eleven".