51142313 has 4 divisors (see below), whose sum is σ = 51485700. Its totient is φ = 50798928.

The previous prime is 51142303. The next prime is 51142361. The reversal of 51142313 is 31324115.

51142313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13344409 + 37797904 = 3653^2 + 6148^2 .

It is a cyclic number.

It is not a de Polignac number, because 51142313 - 2¹⁶ = 51076777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51142303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171470 + ... + 171767.

It is an arithmetic number, because the mean of its divisors is an integer number (12871425).

Almost surely, 2^51142313 is an apocalyptic number.

It is an amenable number.

51142313 is a deficient number, since it is larger than the sum of its proper divisors (343387).

51142313 is a wasteful number, since it uses less digits than its factorization.

51142313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343386.

The product of its digits is 360, while the sum is 20.

The square root of 51142313 is about 7151.3853902583. The cubic root of 51142313 is about 371.1875962935.

Adding to 51142313 its reverse (31324115), we get a palindrome (82466428).

It can be divided in two parts, 511 and 42313, that added together give a palindrome (42824).

The spelling of 51142313 in words is "fifty-one million, one hundred forty-two thousand, three hundred thirteen".