51005541 has 8 divisors (see below), whose sum is σ = 68225920. Its totient is φ = 33894432.

The previous prime is 51005533. The next prime is 51005551. The reversal of 51005541 is 14550015.

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

It is not a de Polignac number, because 51005541 - 2³ = 51005533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51005551) 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, 26221 + ... + 28098.

It is an arithmetic number, because the mean of its divisors is an integer number (8528240).

Almost surely, 2^51005541 is an apocalyptic number.

It is an amenable number.

51005541 is a deficient number, since it is larger than the sum of its proper divisors (17220379).

51005541 is a wasteful number, since it uses less digits than its factorization.

51005541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54635.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 51005541 is about 7141.8163656034. The cubic root of 51005541 is about 370.8564067732.

Adding to 51005541 its reverse (14550015), we get a palindrome (65555556).

The spelling of 51005541 in words is "fifty-one million, five thousand, five hundred forty-one".