51343517 has 4 divisors (see below), whose sum is σ = 52185276. Its totient is φ = 50501760.

The previous prime is 51343483. The next prime is 51343549. The reversal of 51343517 is 71534315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16048036 + 35295481 = 4006^2 + 5941^2 .

It is a cyclic number.

It is not a de Polignac number, because 51343517 - 2⁸ = 51343261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51343517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51343577) 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, 420788 + ... + 420909.

It is an arithmetic number, because the mean of its divisors is an integer number (13046319).

Almost surely, 2^51343517 is an apocalyptic number.

It is an amenable number.

51343517 is a deficient number, since it is larger than the sum of its proper divisors (841759).

51343517 is an equidigital number, since it uses as much as digits as its factorization.

51343517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841758.

The product of its digits is 6300, while the sum is 29.

The square root of 51343517 is about 7165.4390654028. The cubic root of 51343517 is about 371.6737345297.

The spelling of 51343517 in words is "fifty-one million, three hundred forty-three thousand, five hundred seventeen".