402424331 has 2 divisors, whose sum is σ = 402424332. Its totient is φ = 402424330.

The previous prime is 402424327. The next prime is 402424339. The reversal of 402424331 is 133424204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402424331 - 2² = 402424327 is a prime.

It is a super-2 number, since 2×402424331² = 323890684361595122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 402424297 and 402424306.

It is not a weakly prime, because it can be changed into another prime (402424339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201212165 + 201212166.

It is an arithmetic number, because the mean of its divisors is an integer number (201212166).

Almost surely, 2^402424331 is an apocalyptic number.

402424331 is a deficient number, since it is larger than the sum of its proper divisors (1).

402424331 is an equidigital number, since it uses as much as digits as its factorization.

402424331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 402424331 is about 20060.5167181705. The cubic root of 402424331 is about 738.2918544889.

Adding to 402424331 its reverse (133424204), we get a palindrome (535848535).

The spelling of 402424331 in words is "four hundred two million, four hundred twenty-four thousand, three hundred thirty-one".