51857445 has 8 divisors (see below), whose sum is σ = 82971936. Its totient is φ = 27657296.

The previous prime is 51857437. The next prime is 51857453. The reversal of 51857445 is 54475815.

It is an interprime number because it is at equal distance from previous prime (51857437) and next prime (51857453).

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 51857445 - 2³ = 51857437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1728567 + ... + 1728596.

It is an arithmetic number, because the mean of its divisors is an integer number (10371492).

Almost surely, 2^51857445 is an apocalyptic number.

It is an amenable number.

51857445 is a deficient number, since it is larger than the sum of its proper divisors (31114491).

51857445 is a wasteful number, since it uses less digits than its factorization.

51857445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3457171.

The product of its digits is 112000, while the sum is 39.

The square root of 51857445 is about 7201.2113564316. The cubic root of 51857445 is about 372.9097213872.

The spelling of 51857445 in words is "fifty-one million, eight hundred fifty-seven thousand, four hundred forty-five".