51240671 has 16 divisors (see below), whose sum is σ = 54395328. Its totient is φ = 48211200.

The previous prime is 51240647. The next prime is 51240677. The reversal of 51240671 is 17604215.

It is a cyclic number.

It is not a de Polignac number, because 51240671 - 2¹⁰ = 51239647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51240671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51240677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164606 + ... + 164916.

It is an arithmetic number, because the mean of its divisors is an integer number (3399708).

Almost surely, 2^51240671 is an apocalyptic number.

51240671 is a deficient number, since it is larger than the sum of its proper divisors (3154657).

51240671 is a wasteful number, since it uses less digits than its factorization.

51240671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 51240671 is about 7158.2589363616. The cubic root of 51240671 is about 371.4254025723.

Adding to 51240671 its reverse (17604215), we get a palindrome (68844886).

The spelling of 51240671 in words is "fifty-one million, two hundred forty thousand, six hundred seventy-one".