203030000031 has 4 divisors (see below), whose sum is σ = 270706666712. Its totient is φ = 135353333352.

The previous prime is 203030000029. The next prime is 203030000039. The reversal of 203030000031 is 130000030302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 203030000031 - 2¹ = 203030000029 is a prime.

It is a super-2 number, since 2×203030000031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203029999971 and 203030000016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203030000039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33838333336 + ... + 33838333341.

It is an arithmetic number, because the mean of its divisors is an integer number (67676666678).

Almost surely, 2^203030000031 is an apocalyptic number.

203030000031 is a deficient number, since it is larger than the sum of its proper divisors (67676666681).

203030000031 is an equidigital number, since it uses as much as digits as its factorization.

203030000031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67676666680.

The product of its (nonzero) digits is 54, while the sum is 12.

Adding to 203030000031 its reverse (130000030302), we get a palindrome (333030030333).

The spelling of 203030000031 in words is "two hundred three billion, thirty million, thirty-one", and thus it is an aban number.