400553225 has 6 divisors (see below), whose sum is σ = 496686030. Its totient is φ = 320442560.

The previous prime is 400553207. The next prime is 400553239. The reversal of 400553225 is 522355004.

It can be written as a sum of positive squares in 3 ways, for example, as 28526281 + 372026944 = 5341^2 + 19288^2 .

It is not a de Polignac number, because 400553225 - 2⁶ = 400553161 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 400553194 and 400553203.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 8011040 + ... + 8011089.

It is an arithmetic number, because the mean of its divisors is an integer number (82781005).

Almost surely, 2^400553225 is an apocalyptic number.

It is an amenable number.

400553225 is a deficient number, since it is larger than the sum of its proper divisors (96132805).

400553225 is a wasteful number, since it uses less digits than its factorization.

400553225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16022139 (or 16022134 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 400553225 is about 20013.8258461495. The cubic root of 400553225 is about 737.1458263016.

The spelling of 400553225 in words is "four hundred million, five hundred fifty-three thousand, two hundred twenty-five".