51227903 has 4 divisors (see below), whose sum is σ = 52880448. Its totient is φ = 49575360.

The previous prime is 51227899. The next prime is 51227909. The reversal of 51227903 is 30972215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51227903 - 2² = 51227899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51227909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826226 + ... + 826287.

It is an arithmetic number, because the mean of its divisors is an integer number (13220112).

Almost surely, 2^51227903 is an apocalyptic number.

51227903 is a deficient number, since it is larger than the sum of its proper divisors (1652545).

51227903 is a wasteful number, since it uses less digits than its factorization.

51227903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652544.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 51227903 is about 7157.3670438227. The cubic root of 51227903 is about 371.3945497790.

The spelling of 51227903 in words is "fifty-one million, two hundred twenty-seven thousand, nine hundred three".