400402213 has 2 divisors, whose sum is σ = 400402214. Its totient is φ = 400402212.

The previous prime is 400402201. The next prime is 400402273. The reversal of 400402213 is 312204004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373185124 + 27217089 = 19318^2 + 5217^2 .

It is a cyclic number.

It is not a de Polignac number, because 400402213 - 2¹³ = 400394021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400402273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200201106 + 200201107.

It is an arithmetic number, because the mean of its divisors is an integer number (200201107).

Almost surely, 2^400402213 is an apocalyptic number.

It is an amenable number.

400402213 is a deficient number, since it is larger than the sum of its proper divisors (1).

400402213 is an equidigital number, since it uses as much as digits as its factorization.

400402213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 400402213 is about 20010.0527985310. The cubic root of 400402213 is about 737.0531778921.

Adding to 400402213 its reverse (312204004), we get a palindrome (712606217).

The spelling of 400402213 in words is "four hundred million, four hundred two thousand, two hundred thirteen".