51917241 has 4 divisors (see below), whose sum is σ = 69222992. Its totient is φ = 34611492.

The previous prime is 51917207. The next prime is 51917287. The reversal of 51917241 is 14271915.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51917241 - 2¹⁵ = 51884473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51917199 and 51917208.

It is not an unprimeable number, because it can be changed into a prime (51917441) 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, 8652871 + ... + 8652876.

It is an arithmetic number, because the mean of its divisors is an integer number (17305748).

Almost surely, 2^51917241 is an apocalyptic number.

It is an amenable number.

51917241 is a deficient number, since it is larger than the sum of its proper divisors (17305751).

51917241 is a wasteful number, since it uses less digits than its factorization.

51917241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17305750.

The product of its digits is 2520, while the sum is 30.

The square root of 51917241 is about 7205.3619617615. The cubic root of 51917241 is about 373.0529984325.

The spelling of 51917241 in words is "fifty-one million, nine hundred seventeen thousand, two hundred forty-one".