51620903 has 2 divisors, whose sum is σ = 51620904. Its totient is φ = 51620902.

The previous prime is 51620897. The next prime is 51620909. The reversal of 51620903 is 30902615.

51620903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (51620897) and next prime (51620909).

It is a cyclic number.

It is not a de Polignac number, because 51620903 - 2¹⁰ = 51619879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51620909) 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 as a sum of consecutive naturals, namely, 25810451 + 25810452.

It is an arithmetic number, because the mean of its divisors is an integer number (25810452).

Almost surely, 2^51620903 is an apocalyptic number.

51620903 is a deficient number, since it is larger than the sum of its proper divisors (1).

51620903 is an equidigital number, since it uses as much as digits as its factorization.

51620903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 51620903 is about 7184.7688202196. The cubic root of 51620903 is about 372.3418616166.

The spelling of 51620903 in words is "fifty-one million, six hundred twenty thousand, nine hundred three".