51220203 has 8 divisors (see below), whose sum is σ = 69158400. Its totient is φ = 33714408.

The previous prime is 51220199. The next prime is 51220223. The reversal of 51220203 is 30202215.

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

It is not a de Polignac number, because 51220203 - 2² = 51220199 is a prime.

It is a super-2 number, since 2×51220203² = 5247018390722418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51220223) 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, 107823 + ... + 108296.

It is an arithmetic number, because the mean of its divisors is an integer number (8644800).

Almost surely, 2^51220203 is an apocalyptic number.

51220203 is a deficient number, since it is larger than the sum of its proper divisors (17938197).

51220203 is a wasteful number, since it uses less digits than its factorization.

51220203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216201.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 51220203 is about 7156.8291163056. The cubic root of 51220203 is about 371.3759409014.

Adding to 51220203 its reverse (30202215), we get a palindrome (81422418).

The spelling of 51220203 in words is "fifty-one million, two hundred twenty thousand, two hundred three".