51774013 has 4 divisors (see below), whose sum is σ = 51799680. Its totient is φ = 51748348.

The previous prime is 51774011. The next prime is 51774017. The reversal of 51774013 is 31047715.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31047715 = 5 ⋅6209543.

It is a cyclic number.

It is not a de Polignac number, because 51774013 - 2¹ = 51774011 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 (51774011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9523 + ... + 13936.

It is an arithmetic number, because the mean of its divisors is an integer number (12949920).

Almost surely, 2^51774013 is an apocalyptic number.

It is an amenable number.

51774013 is a deficient number, since it is larger than the sum of its proper divisors (25667).

51774013 is a wasteful number, since it uses less digits than its factorization.

51774013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25666.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 51774013 is about 7195.4161102747. The cubic root of 51774013 is about 372.7096260154.

The spelling of 51774013 in words is "fifty-one million, seven hundred seventy-four thousand, thirteen".