51867538 has 8 divisors (see below), whose sum is σ = 78124860. Its totient is φ = 25825920.

The previous prime is 51867533. The next prime is 51867547. The reversal of 51867538 is 83576815.

It can be written as a sum of positive squares in 2 ways, for example, as 39526369 + 12341169 = 6287^2 + 3513^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 51867494 and 51867503.

It is not an unprimeable number, because it can be changed into a prime (51867533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53323 + ... + 54286.

Almost surely, 2^51867538 is an apocalyptic number.

51867538 is a deficient number, since it is larger than the sum of its proper divisors (26257322).

51867538 is a wasteful number, since it uses less digits than its factorization.

51867538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107852.

The product of its digits is 201600, while the sum is 43.

The square root of 51867538 is about 7201.9121072115. The cubic root of 51867538 is about 372.9339129227.

The spelling of 51867538 in words is "fifty-one million, eight hundred sixty-seven thousand, five hundred thirty-eight".