231443541 has 32 divisors (see below), whose sum is σ = 412492800. Its totient is φ = 125290800.

The previous prime is 231443533. The next prime is 231443543. The reversal of 231443541 is 145344132.

It is a happy number.

It is not a de Polignac number, because 231443541 - 2³ = 231443533 is a prime.

It is a super-2 number, since 2×231443541² = 107132225341237362, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231443543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28635 + ... + 35816.

It is an arithmetic number, because the mean of its divisors is an integer number (12890400).

Almost surely, 2^231443541 is an apocalyptic number.

231443541 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

231443541 is a deficient number, since it is larger than the sum of its proper divisors (181049259).

231443541 is a wasteful number, since it uses less digits than its factorization.

231443541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64486 (or 64480 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 231443541 is about 15213.2685837068. The cubic root of 231443541 is about 613.9717021976.

Adding to 231443541 its reverse (145344132), we get a palindrome (376787673).

It can be divided in two parts, 2314435 and 41, that added together give a triangular number (2314476 = T₂₁₅₁).

The spelling of 231443541 in words is "two hundred thirty-one million, four hundred forty-three thousand, five hundred forty-one".