400201229 has 2 divisors, whose sum is σ = 400201230. Its totient is φ = 400201228.

The previous prime is 400201223. The next prime is 400201273. The reversal of 400201229 is 922102004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218005225 + 182196004 = 14765^2 + 13498^2 .

It is a cyclic number.

It is not a de Polignac number, because 400201229 - 2²⁰ = 399152653 is a prime.

It is a super-2 number, since 2×400201229² = 320322047386220882, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400201229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400201223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200100614 + 200100615.

It is an arithmetic number, because the mean of its divisors is an integer number (200100615).

Almost surely, 2^400201229 is an apocalyptic number.

It is an amenable number.

400201229 is a deficient number, since it is larger than the sum of its proper divisors (1).

400201229 is an equidigital number, since it uses as much as digits as its factorization.

400201229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 400201229 is about 20005.0300924542. The cubic root of 400201229 is about 736.9298346771.

The spelling of 400201229 in words is "four hundred million, two hundred one thousand, two hundred twenty-nine".