51201903 has 8 divisors (see below), whose sum is σ = 71862400. Its totient is φ = 32338008.

The previous prime is 51201889. The next prime is 51201919. The reversal of 51201903 is 30910215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51201903 - 2¹⁰ = 51200879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51201903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51201923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449083 + ... + 449196.

It is an arithmetic number, because the mean of its divisors is an integer number (8982800).

Almost surely, 2^51201903 is an apocalyptic number.

51201903 is a deficient number, since it is larger than the sum of its proper divisors (20660497).

51201903 is a wasteful number, since it uses less digits than its factorization.

51201903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898301.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 51201903 is about 7155.5505029313. The cubic root of 51201903 is about 371.3317071235.

The spelling of 51201903 in words is "fifty-one million, two hundred one thousand, nine hundred three".