1231434203 has 4 divisors (see below), whose sum is σ = 1232650848. Its totient is φ = 1230217560.

The previous prime is 1231434187. The next prime is 1231434257. The reversal of 1231434203 is 3024341321.

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

It is a cyclic number.

It is not a de Polignac number, because 1231434203 - 2⁴ = 1231434187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231436203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 606803 + ... + 608828.

It is an arithmetic number, because the mean of its divisors is an integer number (308162712).

Almost surely, 2^1231434203 is an apocalyptic number.

1231434203 is a deficient number, since it is larger than the sum of its proper divisors (1216645).

1231434203 is a wasteful number, since it uses less digits than its factorization.

1231434203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216644.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1231434203 is about 35091.7968049514. The cubic root of 1231434203 is about 1071.8575481217.

Adding to 1231434203 its reverse (3024341321), we get a palindrome (4255775524).

The spelling of 1231434203 in words is "one billion, two hundred thirty-one million, four hundred thirty-four thousand, two hundred three".