402221442431 has 2 divisors, whose sum is σ = 402221442432. Its totient is φ = 402221442430.

The previous prime is 402221442373. The next prime is 402221442439. The reversal of 402221442431 is 134244122204.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402221442431 - 2³⁰ = 401147700607 is a prime.

It is a super-2 number, since 2×402221442431² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 402221442394 and 402221442403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402221442439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201110721215 + 201110721216.

It is an arithmetic number, because the mean of its divisors is an integer number (201110721216).

Almost surely, 2^402221442431 is an apocalyptic number.

402221442431 is a deficient number, since it is larger than the sum of its proper divisors (1).

402221442431 is an equidigital number, since it uses as much as digits as its factorization.

402221442431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 402221442431 its reverse (134244122204), we get a palindrome (536465564635).

The spelling of 402221442431 in words is "four hundred two billion, two hundred twenty-one million, four hundred forty-two thousand, four hundred thirty-one".