402524431 has 2 divisors, whose sum is σ = 402524432. Its totient is φ = 402524430.

The previous prime is 402524417. The next prime is 402524471. The reversal of 402524431 is 134425204.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402524431 - 2⁵ = 402524399 is a prime.

It is a super-2 number, since 2×402524431² = 324051835103747522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402524396 and 402524405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402524471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201262215 + 201262216.

It is an arithmetic number, because the mean of its divisors is an integer number (201262216).

Almost surely, 2^402524431 is an apocalyptic number.

402524431 is a deficient number, since it is larger than the sum of its proper divisors (1).

402524431 is an equidigital number, since it uses as much as digits as its factorization.

402524431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 402524431 is about 20063.0115137284. The cubic root of 402524431 is about 738.3530642470.

Adding to 402524431 its reverse (134425204), we get a palindrome (536949635).

The spelling of 402524431 in words is "four hundred two million, five hundred twenty-four thousand, four hundred thirty-one".