1203431131 has 12 divisors (see below), whose sum is σ = 1409313600. Its totient is φ = 1024583280.

The previous prime is 1203431123. The next prime is 1203431137. The reversal of 1203431131 is 1311343021.

It is not a de Polignac number, because 1203431131 - 2³ = 1203431123 is a prime.

It is a super-2 number, since 2×1203431131² = 2896492974119878322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1203431099 and 1203431108.

It is not an unprimeable number, because it can be changed into a prime (1203431137) 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, 75115 + ... + 89716.

It is an arithmetic number, because the mean of its divisors is an integer number (117442800).

Almost surely, 2^1203431131 is an apocalyptic number.

1203431131 is a deficient number, since it is larger than the sum of its proper divisors (205882469).

1203431131 is a wasteful number, since it uses less digits than its factorization.

1203431131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164994 (or 164987 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1203431131 is about 34690.5049112866. The cubic root of 1203431131 is about 1063.6704167327.

Adding to 1203431131 its reverse (1311343021), we get a palindrome (2514774152).

The spelling of 1203431131 in words is "one billion, two hundred three million, four hundred thirty-one thousand, one hundred thirty-one".