400402201 has 2 divisors, whose sum is σ = 400402202. Its totient is φ = 400402200.

The previous prime is 400402199. The next prime is 400402213. The reversal of 400402201 is 102204004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399800025 + 602176 = 19995^2 + 776^2 .

It is a cyclic number.

It is not a de Polignac number, because 400402201 - 2¹ = 400402199 is a prime.

Together with 400402199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (400402291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200201100 + 200201101.

It is an arithmetic number, because the mean of its divisors is an integer number (200201101).

Almost surely, 2^400402201 is an apocalyptic number.

It is an amenable number.

400402201 is a deficient number, since it is larger than the sum of its proper divisors (1).

400402201 is an equidigital number, since it uses as much as digits as its factorization.

400402201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 400402201 is about 20010.0524986818. The cubic root of 400402201 is about 737.0531705290.

Adding to 400402201 its reverse (102204004), we get a palindrome (502606205).

The spelling of 400402201 in words is "four hundred million, four hundred two thousand, two hundred one".