203149831 has 2 divisors, whose sum is σ = 203149832. Its totient is φ = 203149830.

The previous prime is 203149787. The next prime is 203149841. The reversal of 203149831 is 138941302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 203149831 - 2¹¹ = 203147783 is a prime.

It is a super-2 number, since 2×203149831² = 82539707670657122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 203149793 and 203149802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203149841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101574915 + 101574916.

It is an arithmetic number, because the mean of its divisors is an integer number (101574916).

Almost surely, 2^203149831 is an apocalyptic number.

203149831 is a deficient number, since it is larger than the sum of its proper divisors (1).

203149831 is an equidigital number, since it uses as much as digits as its factorization.

203149831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 203149831 is about 14253.0639162252. The cubic root of 203149831 is about 587.8576241815.

The spelling of 203149831 in words is "two hundred three million, one hundred forty-nine thousand, eight hundred thirty-one".