51445615 has 16 divisors (see below), whose sum is σ = 67481568. Its totient is φ = 37420416.

The previous prime is 51445601. The next prime is 51445633. The reversal of 51445615 is 51654415.

It is a cyclic number.

It is not a de Polignac number, because 51445615 - 2⁷ = 51445487 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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1552 + ... + 10261.

It is an arithmetic number, because the mean of its divisors is an integer number (4217598).

Almost surely, 2^51445615 is an apocalyptic number.

51445615 is a deficient number, since it is larger than the sum of its proper divisors (16035953).

51445615 is a wasteful number, since it uses less digits than its factorization.

51445615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11898.

The product of its digits is 12000, while the sum is 31.

The square root of 51445615 is about 7172.5598638143. The cubic root of 51445615 is about 371.9199325694.

The spelling of 51445615 in words is "fifty-one million, four hundred forty-five thousand, six hundred fifteen".