400022525 has 18 divisors (see below), whose sum is σ = 577013850. Its totient is φ = 274300320.

The previous prime is 400022521. The next prime is 400022531. The reversal of 400022525 is 525220004.

It can be written as a sum of positive squares in 3 ways, for example, as 3136441 + 396886084 = 1771^2 + 19922^2 .

It is not a de Polignac number, because 400022525 - 2² = 400022521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400022497 and 400022506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400022521) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 162050 + ... + 164499.

It is an arithmetic number, because the mean of its divisors is an integer number (32056325).

Almost surely, 2^400022525 is an apocalyptic number.

It is an amenable number.

400022525 is a deficient number, since it is larger than the sum of its proper divisors (176991325).

400022525 is a wasteful number, since it uses less digits than its factorization.

400022525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326573 (or 326561 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 400022525 is about 20000.5631170725. The cubic root of 400022525 is about 736.8201299367.

Adding to 400022525 its reverse (525220004), we get a palindrome (925242529).

The spelling of 400022525 in words is "four hundred million, twenty-two thousand, five hundred twenty-five".