51538845 has 32 divisors (see below), whose sum is σ = 85123584. Its totient is φ = 26611200.

The previous prime is 51538841. The next prime is 51538847. The reversal of 51538845 is 54883515.

It is not a de Polignac number, because 51538845 - 2² = 51538841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51538841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111084 + ... + 111546.

It is an arithmetic number, because the mean of its divisors is an integer number (2660112).

Almost surely, 2^51538845 is an apocalyptic number.

It is an amenable number.

51538845 is a deficient number, since it is larger than the sum of its proper divisors (33584739).

51538845 is a wasteful number, since it uses less digits than its factorization.

51538845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693.

The product of its digits is 96000, while the sum is 39.

The square root of 51538845 is about 7179.0559964385. The cubic root of 51538845 is about 372.1444620449.

The spelling of 51538845 in words is "fifty-one million, five hundred thirty-eight thousand, eight hundred forty-five".