402025331 has 2 divisors, whose sum is σ = 402025332. Its totient is φ = 402025330.

The previous prime is 402025297. The next prime is 402025363. The reversal of 402025331 is 133520204.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402025331 - 2¹⁰ = 402024307 is a prime.

It is a super-3 number, since 3×402025331³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (402025031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201012665 + 201012666.

It is an arithmetic number, because the mean of its divisors is an integer number (201012666).

Almost surely, 2^402025331 is an apocalyptic number.

402025331 is a deficient number, since it is larger than the sum of its proper divisors (1).

402025331 is an equidigital number, since it uses as much as digits as its factorization.

402025331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 402025331 is about 20050.5693435374. The cubic root of 402025331 is about 738.0477706217.

Adding to 402025331 its reverse (133520204), we get a palindrome (535545535).

The spelling of 402025331 in words is "four hundred two million, twenty-five thousand, three hundred thirty-one".