51001105 has 16 divisors (see below), whose sum is σ = 66029904. Its totient is φ = 37672960.

The previous prime is 51001043. The next prime is 51001109. The reversal of 51001105 is 50110015.

It can be written as a sum of positive squares in 8 ways, for example, as 192721 + 50808384 = 439^2 + 7128^2 .

It is not a de Polignac number, because 51001105 - 2¹⁷ = 50870033 is a prime.

It is a super-2 number, since 2×51001105² = 5202225422442050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51001109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1156 + ... + 10165.

It is an arithmetic number, because the mean of its divisors is an integer number (4126869).

Almost surely, 2^51001105 is an apocalyptic number.

It is an amenable number.

51001105 is a deficient number, since it is larger than the sum of its proper divisors (15028799).

51001105 is a wasteful number, since it uses less digits than its factorization.

51001105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11396.

The product of its (nonzero) digits is 25, while the sum is 13.

The square root of 51001105 is about 7141.5057935984. The cubic root of 51001105 is about 370.8456552177.

The spelling of 51001105 in words is "fifty-one million, one thousand, one hundred five".