51550641 has 8 divisors (see below), whose sum is σ = 76371360. Its totient is φ = 34367076.

The previous prime is 51550637. The next prime is 51550643. The reversal of 51550641 is 14605515.

It is a happy number.

51550641 is a `hidden beast` number, since 5 + 15 + 5 + 0 + 641 = 666.

It is not a de Polignac number, because 51550641 - 2² = 51550637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1909283 = 51550641 / (5 + 1 + 5 + 5 + 0 + 6 + 4 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51550643) 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, 954615 + ... + 954668.

It is an arithmetic number, because the mean of its divisors is an integer number (9546420).

Almost surely, 2^51550641 is an apocalyptic number.

It is an amenable number.

51550641 is a deficient number, since it is larger than the sum of its proper divisors (24820719).

51550641 is a wasteful number, since it uses less digits than its factorization.

51550641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909292 (or 1909286 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 51550641 is about 7179.8775059189. The cubic root of 51550641 is about 372.1728515131.

The spelling of 51550641 in words is "fifty-one million, five hundred fifty thousand, six hundred forty-one".