51229903 has 2 divisors, whose sum is σ = 51229904. Its totient is φ = 51229902.

The previous prime is 51229883. The next prime is 51229907. The reversal of 51229903 is 30992215.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51229903 is a prime.

It is a super-2 number, since 2×51229903² = 5249005922778818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51229907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25614951 + 25614952.

It is an arithmetic number, because the mean of its divisors is an integer number (25614952).

Almost surely, 2^51229903 is an apocalyptic number.

51229903 is a deficient number, since it is larger than the sum of its proper divisors (1).

51229903 is an equidigital number, since it uses as much as digits as its factorization.

51229903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 51229903 is about 7157.5067586416. The cubic root of 51229903 is about 371.3993829486.

The spelling of 51229903 in words is "fifty-one million, two hundred twenty-nine thousand, nine hundred three".