402215441 has 2 divisors, whose sum is σ = 402215442. Its totient is φ = 402215440.

The previous prime is 402215381. The next prime is 402215459. The reversal of 402215441 is 144512204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246490000 + 155725441 = 15700^2 + 12479^2 .

It is a cyclic number.

It is not a de Polignac number, because 402215441 - 2¹⁸ = 401953297 is a prime.

It is a super-3 number, since 3×402215441³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (402215141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201107720 + 201107721.

It is an arithmetic number, because the mean of its divisors is an integer number (201107721).

Almost surely, 2^402215441 is an apocalyptic number.

It is an amenable number.

402215441 is a deficient number, since it is larger than the sum of its proper divisors (1).

402215441 is an equidigital number, since it uses as much as digits as its factorization.

402215441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 402215441 is about 20055.3095463521. The cubic root of 402215441 is about 738.1640884588.

Adding to 402215441 its reverse (144512204), we get a palindrome (546727645).

The spelling of 402215441 in words is "four hundred two million, two hundred fifteen thousand, four hundred forty-one".