51913837 has 2 divisors, whose sum is σ = 51913838. Its totient is φ = 51913836.

The previous prime is 51913817. The next prime is 51913879. The reversal of 51913837 is 73831915.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51466276 + 447561 = 7174^2 + 669^2 .

It is a cyclic number.

It is not a de Polignac number, because 51913837 - 2¹⁹ = 51389549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51913796 and 51913805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51913817) 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 as a sum of consecutive naturals, namely, 25956918 + 25956919.

It is an arithmetic number, because the mean of its divisors is an integer number (25956919).

Almost surely, 2^51913837 is an apocalyptic number.

It is an amenable number.

51913837 is a deficient number, since it is larger than the sum of its proper divisors (1).

51913837 is an equidigital number, since it uses as much as digits as its factorization.

51913837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 51913837 is about 7205.1257449124. The cubic root of 51913837 is about 373.0448450707.

The spelling of 51913837 in words is "fifty-one million, nine hundred thirteen thousand, eight hundred thirty-seven".