51219890903 has 8 divisors (see below), whose sum is σ = 54260348688. Its totient is φ = 48182491264.

The previous prime is 51219890899. The next prime is 51219890921. The reversal of 51219890903 is 30909891215.

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

It is not a de Polignac number, because 51219890903 - 2² = 51219890899 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 (51219890983) 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, 730001 + ... + 797082.

It is an arithmetic number, because the mean of its divisors is an integer number (6782543586).

Almost surely, 2^51219890903 is an apocalyptic number.

51219890903 is a deficient number, since it is larger than the sum of its proper divisors (3040457785).

51219890903 is a wasteful number, since it uses less digits than its factorization.

51219890903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529073.

The product of its (nonzero) digits is 174960, while the sum is 47.

The spelling of 51219890903 in words is "fifty-one billion, two hundred nineteen million, eight hundred ninety thousand, nine hundred three".