402420403134331 has 2 divisors, whose sum is σ = 402420403134332. Its totient is φ = 402420403134330.

The previous prime is 402420403134319. The next prime is 402420403134341. The reversal of 402420403134331 is 133431304024204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402420403134331 is a prime.

It is a super-2 number, since 2×402420403134331² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (402420403134301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201210201567165 + 201210201567166.

It is an arithmetic number, because the mean of its divisors is an integer number (201210201567166).

Almost surely, 2^{402420403134331} is an apocalyptic number.

402420403134331 is a deficient number, since it is larger than the sum of its proper divisors (1).

402420403134331 is an equidigital number, since it uses as much as digits as its factorization.

402420403134331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 402420403134331 its reverse (133431304024204), we get a palindrome (535851707158535).

The spelling of 402420403134331 in words is "four hundred two trillion, four hundred twenty billion, four hundred three million, one hundred thirty-four thousand, three hundred thirty-one".