400555325 has 6 divisors (see below), whose sum is σ = 496688634. Its totient is φ = 320444240.

The previous prime is 400555301. The next prime is 400555339. The reversal of 400555325 is 523555004.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2393209 + 398162116 = 1547^2 + 19954^2 .

It is not a de Polignac number, because 400555325 - 2⁸ = 400555069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8011082 + ... + 8011131.

It is an arithmetic number, because the mean of its divisors is an integer number (82781439).

Almost surely, 2^400555325 is an apocalyptic number.

It is an amenable number.

400555325 is a deficient number, since it is larger than the sum of its proper divisors (96133309).

400555325 is a wasteful number, since it uses less digits than its factorization.

400555325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16022223 (or 16022218 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 29.

The square root of 400555325 is about 20013.8783098129. The cubic root of 400555325 is about 737.1471145229.

The spelling of 400555325 in words is "four hundred million, five hundred fifty-five thousand, three hundred twenty-five".