146543231 has 4 divisors (see below), whose sum is σ = 151270464. Its totient is φ = 141816000.

The previous prime is 146543203. The next prime is 146543239. The reversal of 146543231 is 132345641.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146543231 is a prime.

It is a super-2 number, since 2×146543231² = 42949837103838722, 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 = 146543194 and 146543203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146543239) 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, 2363570 + ... + 2363631.

It is an arithmetic number, because the mean of its divisors is an integer number (37817616).

Almost surely, 2^146543231 is an apocalyptic number.

146543231 is a deficient number, since it is larger than the sum of its proper divisors (4727233).

146543231 is an equidigital number, since it uses as much as digits as its factorization.

146543231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4727232.

The product of its digits is 8640, while the sum is 29.

The square root of 146543231 is about 12105.5041613309. The cubic root of 146543231 is about 527.2160069972.

Adding to 146543231 its reverse (132345641), we get a palindrome (278888872).

The spelling of 146543231 in words is "one hundred forty-six million, five hundred forty-three thousand, two hundred thirty-one".