403345231 has 4 divisors (see below), whose sum is σ = 404244000. Its totient is φ = 402446464.

The previous prime is 403345199. The next prime is 403345277. The reversal of 403345231 is 132543304.

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 403345231 - 2⁵ = 403345199 is a prime.

It is a super-2 number, since 2×403345231² = 325374750740886722, 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 = 403345196 and 403345205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403345531) 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, 448711 + ... + 449608.

It is an arithmetic number, because the mean of its divisors is an integer number (101061000).

Almost surely, 2^403345231 is an apocalyptic number.

403345231 is a deficient number, since it is larger than the sum of its proper divisors (898769).

403345231 is an equidigital number, since it uses as much as digits as its factorization.

403345231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898768.

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

The square root of 403345231 is about 20083.4566496906. The cubic root of 403345231 is about 738.8545896889.

Adding to 403345231 its reverse (132543304), we get a palindrome (535888535).

The spelling of 403345231 in words is "four hundred three million, three hundred forty-five thousand, two hundred thirty-one".