400142233 has 2 divisors, whose sum is σ = 400142234. Its totient is φ = 400142232.

The previous prime is 400142227. The next prime is 400142257. The reversal of 400142233 is 332241004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 286015744 + 114126489 = 16912^2 + 10683^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400142233 is a prime.

It is a super-2 number, since 2×400142233² = 320227613260452578, 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 400142233.

It is not a weakly prime, because it can be changed into another prime (400142213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200071116 + 200071117.

It is an arithmetic number, because the mean of its divisors is an integer number (200071117).

Almost surely, 2^400142233 is an apocalyptic number.

It is an amenable number.

400142233 is a deficient number, since it is larger than the sum of its proper divisors (1).

400142233 is an equidigital number, since it uses as much as digits as its factorization.

400142233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 400142233 is about 20003.5555089589. Note that the first 4 decimals coincide. The cubic root of 400142233 is about 736.8936211876.

Adding to 400142233 its reverse (332241004), we get a palindrome (732383237).

The spelling of 400142233 in words is "four hundred million, one hundred forty-two thousand, two hundred thirty-three".