402324144421 has 2 divisors, whose sum is σ = 402324144422. Its totient is φ = 402324144420.

The previous prime is 402324144359. The next prime is 402324144427. The reversal of 402324144421 is 124441423204.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 274507884225 + 127816260196 = 523935^2 + 357514^2 .

It is a cyclic number.

It is not a de Polignac number, because 402324144421 - 2¹³ = 402324136229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402324144427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201162072210 + 201162072211.

It is an arithmetic number, because the mean of its divisors is an integer number (201162072211).

Almost surely, 2^402324144421 is an apocalyptic number.

It is an amenable number.

402324144421 is a deficient number, since it is larger than the sum of its proper divisors (1).

402324144421 is an equidigital number, since it uses as much as digits as its factorization.

402324144421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 402324144421 its reverse (124441423204), we get a palindrome (526765567625).

The spelling of 402324144421 in words is "four hundred two billion, three hundred twenty-four million, one hundred forty-four thousand, four hundred twenty-one".