402241331 has 2 divisors, whose sum is σ = 402241332. Its totient is φ = 402241330.

The previous prime is 402241313. The next prime is 402241363. The reversal of 402241331 is 133142204.

Together with previous prime (402241313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402241331 - 2²⁶ = 335132467 is a prime.

It is a super-2 number, since 2×402241331² = 323596176729303122, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (402241391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201120665 + 201120666.

It is an arithmetic number, because the mean of its divisors is an integer number (201120666).

Almost surely, 2^402241331 is an apocalyptic number.

402241331 is a deficient number, since it is larger than the sum of its proper divisors (1).

402241331 is an equidigital number, since it uses as much as digits as its factorization.

402241331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 402241331 is about 20055.9550009467. The cubic root of 402241331 is about 738.1799262878.

Adding to 402241331 its reverse (133142204), we get a palindrome (535383535).

The spelling of 402241331 in words is "four hundred two million, two hundred forty-one thousand, three hundred thirty-one".