51445105 has 4 divisors (see below), whose sum is σ = 61734132. Its totient is φ = 41156080.

The previous prime is 51445091. The next prime is 51445117. The reversal of 51445105 is 50154415.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28058209 + 23386896 = 5297^2 + 4836^2 .

It is not a de Polignac number, because 51445105 - 2¹¹ = 51443057 is a prime.

It is a super-2 number, since 2×51445105² = 5293197656922050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51445105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5144506 + ... + 5144515.

It is an arithmetic number, because the mean of its divisors is an integer number (15433533).

Almost surely, 2^51445105 is an apocalyptic number.

It is an amenable number.

51445105 is a deficient number, since it is larger than the sum of its proper divisors (10289027).

51445105 is a wasteful number, since it uses less digits than its factorization.

51445105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10289026.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 51445105 is about 7172.5243115656. The cubic root of 51445105 is about 371.9187035707.

The spelling of 51445105 in words is "fifty-one million, four hundred forty-five thousand, one hundred five".