51544987 has 8 divisors (see below), whose sum is σ = 55566896. Its totient is φ = 47531232.

The previous prime is 51544957. The next prime is 51545023. The reversal of 51544987 is 78944515.

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 51544987 - 2⁷ = 51544859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51544957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19933 + ... + 22369.

It is an arithmetic number, because the mean of its divisors is an integer number (6945862).

Almost surely, 2^51544987 is an apocalyptic number.

51544987 is a deficient number, since it is larger than the sum of its proper divisors (4021909).

51544987 is a wasteful number, since it uses less digits than its factorization.

51544987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4077.

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

The square root of 51544987 is about 7179.4837558142. The cubic root of 51544987 is about 372.1592445550.

The spelling of 51544987 in words is "fifty-one million, five hundred forty-four thousand, nine hundred eighty-seven".