51105561101 has 4 divisors (see below), whose sum is σ = 58406355552. Its totient is φ = 43804766652.

The previous prime is 51105561079. The next prime is 51105561121. The reversal of 51105561101 is 10116550115.

51105561101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51105561101 - 2¹⁸ = 51105298957 is a prime.

It is a super-2 number, since 2×51105561101² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51105561121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3650397215 + ... + 3650397228.

It is an arithmetic number, because the mean of its divisors is an integer number (14601588888).

Almost surely, 2^51105561101 is an apocalyptic number.

It is an amenable number.

51105561101 is a deficient number, since it is larger than the sum of its proper divisors (7300794451).

51105561101 is an equidigital number, since it uses as much as digits as its factorization.

51105561101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7300794450.

The product of its (nonzero) digits is 750, while the sum is 26.

The spelling of 51105561101 in words is "fifty-one billion, one hundred five million, five hundred sixty-one thousand, one hundred one".