400223525 has 12 divisors (see below), whose sum is σ = 534452772. Its totient is φ = 295549440.

The previous prime is 400223497. The next prime is 400223533. The reversal of 400223525 is 525322004.

It can be written as a sum of positive squares in 6 ways, for example, as 148620481 + 251603044 = 12191^2 + 15862^2 .

It is a de Polignac number, because none of the positive numbers 2^k-400223525 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400223525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 615404 + ... + 616053.

It is an arithmetic number, because the mean of its divisors is an integer number (44537731).

Almost surely, 2^400223525 is an apocalyptic number.

It is an amenable number.

400223525 is a deficient number, since it is larger than the sum of its proper divisors (134229247).

400223525 is a wasteful number, since it uses less digits than its factorization.

400223525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231480 (or 1231475 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 400223525 is about 20005.5873445395. The cubic root of 400223525 is about 736.9435196946.

Adding to 400223525 its reverse (525322004), we get a palindrome (925545529).

The spelling of 400223525 in words is "four hundred million, two hundred twenty-three thousand, five hundred twenty-five".