231620343 has 4 divisors (see below), whose sum is σ = 308827128. Its totient is φ = 154413560.

The previous prime is 231620341. The next prime is 231620387. The reversal of 231620343 is 343026132.

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 231620343 - 2¹ = 231620341 is a prime.

It is a super-4 number, since 4×231620343⁴ (a number of 35 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231620341) 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, 38603388 + ... + 38603393.

It is an arithmetic number, because the mean of its divisors is an integer number (77206782).

Almost surely, 2^231620343 is an apocalyptic number.

231620343 is a deficient number, since it is larger than the sum of its proper divisors (77206785).

231620343 is an equidigital number, since it uses as much as digits as its factorization.

231620343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77206784.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 231620343 is about 15219.0782572402. The cubic root of 231620343 is about 614.1280020810.

Adding to 231620343 its reverse (343026132), we get a palindrome (574646475).

The spelling of 231620343 in words is "two hundred thirty-one million, six hundred twenty thousand, three hundred forty-three".