353440231 has 4 divisors (see below), whose sum is σ = 358281952. Its totient is φ = 348598512.

The previous prime is 353440189. The next prime is 353440249. The reversal of 353440231 is 132044353.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132044353 = 7 ⋅18863479.

It is a cyclic number.

It is not a de Polignac number, because 353440231 - 2⁹ = 353439719 is a prime.

It is a super-2 number, since 2×353440231² = 249839993778666722, 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 = 353440196 and 353440205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (353440531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2420751 + ... + 2420896.

It is an arithmetic number, because the mean of its divisors is an integer number (89570488).

Almost surely, 2^353440231 is an apocalyptic number.

353440231 is a deficient number, since it is larger than the sum of its proper divisors (4841721).

353440231 is an equidigital number, since it uses as much as digits as its factorization.

353440231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4841720.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 353440231 is about 18800.0061436160. The cubic root of 353440231 is about 707.0313334078.

Adding to 353440231 its reverse (132044353), we get a palindrome (485484584).

The spelling of 353440231 in words is "three hundred fifty-three million, four hundred forty thousand, two hundred thirty-one".