400221485 has 16 divisors (see below), whose sum is σ = 495720000. Its totient is φ = 310037376.

The previous prime is 400221473. The next prime is 400221509. The reversal of 400221485 is 584122004.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 400221485 - 2¹⁰ = 400220461 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9641 + ... + 29889.

It is an arithmetic number, because the mean of its divisors is an integer number (30982500).

Almost surely, 2^400221485 is an apocalyptic number.

It is an amenable number.

400221485 is a deficient number, since it is larger than the sum of its proper divisors (95498515).

400221485 is a wasteful number, since it uses less digits than its factorization.

400221485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20380.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 400221485 is about 20005.5363587183. The cubic root of 400221485 is about 736.9422675882.

Adding to 400221485 its reverse (584122004), we get a palindrome (984343489).

The spelling of 400221485 in words is "four hundred million, two hundred twenty-one thousand, four hundred eighty-five".