51105425 has 24 divisors (see below), whose sum is σ = 75578496. Its totient is φ = 33517440.

The previous prime is 51105367. The next prime is 51105443. The reversal of 51105425 is 52450115.

It is a happy number.

51105425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-51105425 is a prime.

It is a super-2 number, since 2×51105425² = 5223528928861250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 51105425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2324 + ... + 10373.

It is an arithmetic number, because the mean of its divisors is an integer number (3149104).

Almost surely, 2^51105425 is an apocalyptic number.

It is an amenable number.

51105425 is a deficient number, since it is larger than the sum of its proper divisors (24473071).

51105425 is a wasteful number, since it uses less digits than its factorization.

51105425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12737 (or 12732 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 51105425 is about 7148.8058443351. The cubic root of 51105425 is about 371.0983312565.

The spelling of 51105425 in words is "fifty-one million, one hundred five thousand, four hundred twenty-five".