51234613 has 2 divisors, whose sum is σ = 51234614. Its totient is φ = 51234612.

The previous prime is 51234611. The next prime is 51234637. The reversal of 51234613 is 31643215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33443089 + 17791524 = 5783^2 + 4218^2 .

It is a cyclic number.

It is not a de Polignac number, because 51234613 - 2¹ = 51234611 is a prime.

Together with 51234611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51234611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25617306 + 25617307.

It is an arithmetic number, because the mean of its divisors is an integer number (25617307).

Almost surely, 2^51234613 is an apocalyptic number.

It is an amenable number.

51234613 is a deficient number, since it is larger than the sum of its proper divisors (1).

51234613 is an equidigital number, since it uses as much as digits as its factorization.

51234613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 25.

The square root of 51234613 is about 7157.8357762665. The cubic root of 51234613 is about 371.4107645662.

Adding to 51234613 its reverse (31643215), we get a palindrome (82877828).

The spelling of 51234613 in words is "fifty-one million, two hundred thirty-four thousand, six hundred thirteen".