402203261 has 2 divisors, whose sum is σ = 402203262. Its totient is φ = 402203260.

The previous prime is 402203251. The next prime is 402203303. The reversal of 402203261 is 162302204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288354361 + 113848900 = 16981^2 + 10670^2 .

It is a cyclic number.

It is not a de Polignac number, because 402203261 - 2¹⁰ = 402202237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402203251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201101630 + 201101631.

It is an arithmetic number, because the mean of its divisors is an integer number (201101631).

Almost surely, 2^402203261 is an apocalyptic number.

It is an amenable number.

402203261 is a deficient number, since it is larger than the sum of its proper divisors (1).

402203261 is an equidigital number, since it uses as much as digits as its factorization.

402203261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 402203261 is about 20055.0058838186. The cubic root of 402203261 is about 738.1566372867.

Adding to 402203261 its reverse (162302204), we get a palindrome (564505465).

The spelling of 402203261 in words is "four hundred two million, two hundred three thousand, two hundred sixty-one".