203404111031 has 12 divisors (see below), whose sum is σ = 224024535000. Its totient is φ = 184542206640.

The previous prime is 203404110979. The next prime is 203404111061. The reversal of 203404111031 is 130111404302.

It is not a de Polignac number, because 203404111031 - 2⁶ = 203404110967 is a prime.

It is a super-2 number, since 2×203404111031² (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 = 203404110994 and 203404111012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203404111061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1624016 + ... + 1744773.

It is an arithmetic number, because the mean of its divisors is an integer number (18668711250).

Almost surely, 2^203404111031 is an apocalyptic number.

203404111031 is a deficient number, since it is larger than the sum of its proper divisors (20620423969).

203404111031 is a wasteful number, since it uses less digits than its factorization.

203404111031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3369310 (or 3369299 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 203404111031 its reverse (130111404302), we get a palindrome (333515515333).

The spelling of 203404111031 in words is "two hundred three billion, four hundred four million, one hundred eleven thousand, thirty-one".