51203389 has 2 divisors, whose sum is σ = 51203390. Its totient is φ = 51203388.

The previous prime is 51203387. The next prime is 51203393. The reversal of 51203389 is 98330215.

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., 34047225 + 17156164 = 5835^2 + 4142^2 .

It is a cyclic number.

It is not a de Polignac number, because 51203389 - 2¹ = 51203387 is a prime.

Together with 51203387, it forms a pair of twin primes.

It is equal to p_3068905 and since 51203389 and 3068905 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51203389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51203387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25601694 + 25601695.

It is an arithmetic number, because the mean of its divisors is an integer number (25601695).

Almost surely, 2^51203389 is an apocalyptic number.

It is an amenable number.

51203389 is a deficient number, since it is larger than the sum of its proper divisors (1).

51203389 is an equidigital number, since it uses as much as digits as its factorization.

51203389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 51203389 is about 7155.6543376549. The cubic root of 51203389 is about 371.3352993961.

The spelling of 51203389 in words is "fifty-one million, two hundred three thousand, three hundred eighty-nine".