51201633403 has 4 divisors (see below), whose sum is σ = 51219709528. Its totient is φ = 51183557280.

The previous prime is 51201633397. The next prime is 51201633421. The reversal of 51201633403 is 30433610215.

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 51201633403 - 2²⁵ = 51168078971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51201633433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9033813 + ... + 9039478.

It is an arithmetic number, because the mean of its divisors is an integer number (12804927382).

Almost surely, 2^51201633403 is an apocalyptic number.

51201633403 is a deficient number, since it is larger than the sum of its proper divisors (18076125).

51201633403 is a wasteful number, since it uses less digits than its factorization.

51201633403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18076124.

The product of its (nonzero) digits is 6480, while the sum is 28.

The spelling of 51201633403 in words is "fifty-one billion, two hundred one million, six hundred thirty-three thousand, four hundred three".