51490445 has 8 divisors (see below), whose sum is σ = 64475136. Its totient is φ = 39401296.

The previous prime is 51490409. The next prime is 51490451. The reversal of 51490445 is 54409415.

51490445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51490445 - 2⁶ = 51490381 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 223757 + ... + 223986.

It is an arithmetic number, because the mean of its divisors is an integer number (8059392).

Almost surely, 2^51490445 is an apocalyptic number.

It is an amenable number.

51490445 is a deficient number, since it is larger than the sum of its proper divisors (12984691).

51490445 is a wasteful number, since it uses less digits than its factorization.

51490445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447771.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 51490445 is about 7175.6842879268. The cubic root of 51490445 is about 372.0279322495.

The spelling of 51490445 in words is "fifty-one million, four hundred ninety thousand, four hundred forty-five".