400550201 has 2 divisors, whose sum is σ = 400550202. Its totient is φ = 400550200.

The previous prime is 400550119. The next prime is 400550207. The reversal of 400550201 is 102055004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 360240400 + 40309801 = 18980^2 + 6349^2 .

It is a cyclic number.

It is not a de Polignac number, because 400550201 - 2¹⁴ = 400533817 is a prime.

It is a super-2 number, since 2×400550201² = 320880927042280802, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400550201.

It is not a weakly prime, because it can be changed into another prime (400550207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200275100 + 200275101.

It is an arithmetic number, because the mean of its divisors is an integer number (200275101).

Almost surely, 2^400550201 is an apocalyptic number.

It is an amenable number.

400550201 is a deficient number, since it is larger than the sum of its proper divisors (1).

400550201 is an equidigital number, since it uses as much as digits as its factorization.

400550201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 400550201 is about 20013.7502982325. The cubic root of 400550201 is about 737.1439712551.

The spelling of 400550201 in words is "four hundred million, five hundred fifty thousand, two hundred one".