51245641012111 has 16 divisors (see below), whose sum is σ = 63115881278464. Its totient is φ = 40517508252384.

The previous prime is 51245641012081. The next prime is 51245641012121. The reversal of 51245641012111 is 11121014654215.

It is a cyclic number.

It is not a de Polignac number, because 51245641012111 - 2²⁵ = 51245607457679 is a prime.

It is a super-2 number, since 2×51245641012111² (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 (51245641012121) 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, 197740821 + ... + 197999806.

It is an arithmetic number, because the mean of its divisors is an integer number (3944742579904).

Almost surely, 2^{51245641012111} is an apocalyptic number.

51245641012111 is a deficient number, since it is larger than the sum of its proper divisors (11870240266353).

51245641012111 is a wasteful number, since it uses less digits than its factorization.

51245641012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395742070.

The product of its (nonzero) digits is 9600, while the sum is 34.

Adding to 51245641012111 its reverse (11121014654215), we get a palindrome (62366655666326).

The spelling of 51245641012111 in words is "fifty-one trillion, two hundred forty-five billion, six hundred forty-one million, twelve thousand, one hundred eleven".