51731203 has 2 divisors, whose sum is σ = 51731204. Its totient is φ = 51731202.

The previous prime is 51731171. The next prime is 51731237. The reversal of 51731203 is 30213715.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51731203 - 2⁵ = 51731171 is a prime.

It is a super-2 number, since 2×51731203² = 5352234727654418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51731263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25865601 + 25865602.

It is an arithmetic number, because the mean of its divisors is an integer number (25865602).

Almost surely, 2^51731203 is an apocalyptic number.

51731203 is a deficient number, since it is larger than the sum of its proper divisors (1).

51731203 is an equidigital number, since it uses as much as digits as its factorization.

51731203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 51731203 is about 7192.4406844965. The cubic root of 51731203 is about 372.6068711267.

Adding to 51731203 its reverse (30213715), we get a palindrome (81944918).

The spelling of 51731203 in words is "fifty-one million, seven hundred thirty-one thousand, two hundred three".