231203445 has 16 divisors (see below), whose sum is σ = 403555392. Its totient is φ = 112098560.

The previous prime is 231203407. The next prime is 231203471. The reversal of 231203445 is 544302132.

It is not a de Polignac number, because 231203445 - 2¹⁰ = 231202421 is a prime.

It is a super-3 number, since 3×231203445³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 700452 + ... + 700781.

It is an arithmetic number, because the mean of its divisors is an integer number (25222212).

Almost surely, 2^231203445 is an apocalyptic number.

It is an amenable number.

231203445 is a deficient number, since it is larger than the sum of its proper divisors (172351947).

231203445 is a wasteful number, since it uses less digits than its factorization.

231203445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401252.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 231203445 is about 15205.3755297263. The cubic root of 231203445 is about 613.7593204464.

Adding to 231203445 its reverse (544302132), we get a palindrome (775505577).

It can be divided in two parts, 23120 and 3445, that added together give a triangular number (26565 = T₂₃₀).

The spelling of 231203445 in words is "two hundred thirty-one million, two hundred three thousand, four hundred forty-five".