51155903 has 2 divisors, whose sum is σ = 51155904. Its totient is φ = 51155902.

The previous prime is 51155851. The next prime is 51155911. The reversal of 51155903 is 30955115.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51155903 - 2¹⁰ = 51154879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51155953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25577951 + 25577952.

It is an arithmetic number, because the mean of its divisors is an integer number (25577952).

Almost surely, 2^51155903 is an apocalyptic number.

51155903 is a deficient number, since it is larger than the sum of its proper divisors (1).

51155903 is an equidigital number, since it uses as much as digits as its factorization.

51155903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 51155903 is about 7152.3354926905. The cubic root of 51155903 is about 371.2204718283.

The spelling of 51155903 in words is "fifty-one million, one hundred fifty-five thousand, nine hundred three".