400240133 has 2 divisors, whose sum is σ = 400240134. Its totient is φ = 400240132.

The previous prime is 400240103. The next prime is 400240189. The reversal of 400240133 is 331042004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 383454724 + 16785409 = 19582^2 + 4097^2 .

It is a cyclic number.

It is not a de Polignac number, because 400240133 - 2¹⁶ = 400174597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400240103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200120066 + 200120067.

It is an arithmetic number, because the mean of its divisors is an integer number (200120067).

Almost surely, 2^400240133 is an apocalyptic number.

It is an amenable number.

400240133 is a deficient number, since it is larger than the sum of its proper divisors (1).

400240133 is an equidigital number, since it uses as much as digits as its factorization.

400240133 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 17.

The square root of 400240133 is about 20006.0024242726. The cubic root of 400240133 is about 736.9537131556.

Adding to 400240133 its reverse (331042004), we get a palindrome (731282137).

The spelling of 400240133 in words is "four hundred million, two hundred forty thousand, one hundred thirty-three".