51105401 has 4 divisors (see below), whose sum is σ = 51153252. Its totient is φ = 51057552.

The previous prime is 51105367. The next prime is 51105443. The reversal of 51105401 is 10450115.

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 49000000 + 2105401 = 7000^2 + 1451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51105401 is a prime.

It is a super-2 number, since 2×51105401² = 5223524022741602, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51105401.

It is not an unprimeable number, because it can be changed into a prime (51105001) 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, 22286 + ... + 24471.

It is an arithmetic number, because the mean of its divisors is an integer number (12788313).

Almost surely, 2^51105401 is an apocalyptic number.

It is an amenable number.

51105401 is a deficient number, since it is larger than the sum of its proper divisors (47851).

51105401 is a wasteful number, since it uses less digits than its factorization.

51105401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47850.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 51105401 is about 7148.8041657329. The cubic root of 51105401 is about 371.0982731650.

Adding to 51105401 its reverse (10450115), we get a palindrome (61555516).

The spelling of 51105401 in words is "fifty-one million, one hundred five thousand, four hundred one".