203130031 has 16 divisors (see below), whose sum is σ = 225227520. Its totient is φ = 182004480.

The previous prime is 203130029. The next prime is 203130047. The reversal of 203130031 is 130031302.

203130031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 203130031 - 2¹ = 203130029 is a prime.

It is a super-2 number, since 2×203130031² = 82523618988121922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203129993 and 203130020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203130071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118005 + ... + 119713.

It is an arithmetic number, because the mean of its divisors is an integer number (14076720).

Almost surely, 2^203130031 is an apocalyptic number.

203130031 is a deficient number, since it is larger than the sum of its proper divisors (22097489).

203130031 is a wasteful number, since it uses less digits than its factorization.

203130031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 203130031 is about 14252.3693118022. The cubic root of 203130031 is about 587.8385250449.

Adding to 203130031 its reverse (130031302), we get a palindrome (333161333).

The spelling of 203130031 in words is "two hundred three million, one hundred thirty thousand, thirty-one".