400221625 has 32 divisors (see below), whose sum is σ = 519367680. Its totient is φ = 307584000.

The previous prime is 400221617. The next prime is 400221673. The reversal of 400221625 is 526122004.

It is not a de Polignac number, because 400221625 - 2³ = 400221617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400221596 and 400221605.

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 31 ways as a sum of consecutive naturals, for example, 693337 + ... + 693913.

It is an arithmetic number, because the mean of its divisors is an integer number (16230240).

Almost surely, 2^400221625 is an apocalyptic number.

It is an amenable number.

400221625 is a deficient number, since it is larger than the sum of its proper divisors (119146055).

400221625 is a wasteful number, since it uses less digits than its factorization.

400221625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802 (or 792 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 400221625 is about 20005.5398577494. The cubic root of 400221625 is about 736.9423535172.

Adding to 400221625 its reverse (526122004), we get a palindrome (926343629).

The spelling of 400221625 in words is "four hundred million, two hundred twenty-one thousand, six hundred twenty-five".