402231451 has 2 divisors, whose sum is σ = 402231452. Its totient is φ = 402231450.

The previous prime is 402231419. The next prime is 402231461. The reversal of 402231451 is 154132204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402231451 - 2⁵ = 402231419 is a prime.

It is not a weakly prime, because it can be changed into another prime (402231461) 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, 201115725 + 201115726.

It is an arithmetic number, because the mean of its divisors is an integer number (201115726).

Almost surely, 2^402231451 is an apocalyptic number.

402231451 is a deficient number, since it is larger than the sum of its proper divisors (1).

402231451 is an equidigital number, since it uses as much as digits as its factorization.

402231451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 402231451 is about 20055.7086885505. The cubic root of 402231451 is about 738.1738824224.

Adding to 402231451 its reverse (154132204), we get a palindrome (556363655).

The spelling of 402231451 in words is "four hundred two million, two hundred thirty-one thousand, four hundred fifty-one".