400551253 has 2 divisors, whose sum is σ = 400551254. Its totient is φ = 400551252.

The previous prime is 400551247. The next prime is 400551289. The reversal of 400551253 is 352155004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 391169284 + 9381969 = 19778^2 + 3063^2 .

It is a cyclic number.

It is not a de Polignac number, because 400551253 - 2⁹ = 400550741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400551223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200275626 + 200275627.

It is an arithmetic number, because the mean of its divisors is an integer number (200275627).

Almost surely, 2^400551253 is an apocalyptic number.

It is an amenable number.

400551253 is a deficient number, since it is larger than the sum of its proper divisors (1).

400551253 is an equidigital number, since it uses as much as digits as its factorization.

400551253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 400551253 is about 20013.7765801460. The cubic root of 400551253 is about 737.1446165964.

The spelling of 400551253 in words is "four hundred million, five hundred fifty-one thousand, two hundred fifty-three".