51240471 has 8 divisors (see below), whose sum is σ = 68356080. Its totient is φ = 34142592.

The previous prime is 51240467. The next prime is 51240493. The reversal of 51240471 is 17404215.

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

It is not a de Polignac number, because 51240471 - 2² = 51240467 is a prime.

It is a super-3 number, since 3×51240471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51240451) 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, 5485 + ... + 11513.

It is an arithmetic number, because the mean of its divisors is an integer number (8544510).

Almost surely, 2^51240471 is an apocalyptic number.

51240471 is a deficient number, since it is larger than the sum of its proper divisors (17115609).

51240471 is a wasteful number, since it uses less digits than its factorization.

51240471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8865.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 51240471 is about 7158.2449664705. The cubic root of 51240471 is about 371.4249193287.

Adding to 51240471 its reverse (17404215), we get a palindrome (68644686).

The spelling of 51240471 in words is "fifty-one million, two hundred forty thousand, four hundred seventy-one".