400225775 has 12 divisors (see below), whose sum is σ = 498264984. Its totient is φ = 318900000.

The previous prime is 400225759. The next prime is 400225817. The reversal of 400225775 is 577522004.

It is not a de Polignac number, because 400225775 - 2⁴ = 400225759 is a prime.

It is a Duffinian number.

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, 25616 + ... + 38165.

It is an arithmetic number, because the mean of its divisors is an integer number (41522082).

Almost surely, 2^400225775 is an apocalyptic number.

400225775 is a deficient number, since it is larger than the sum of its proper divisors (98039209).

400225775 is a wasteful number, since it uses less digits than its factorization.

400225775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64042 (or 64037 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 400225775 is about 20005.6435787505. The cubic root of 400225775 is about 736.9449006894.

Adding to 400225775 its reverse (577522004), we get a palindrome (977747779).

The spelling of 400225775 in words is "four hundred million, two hundred twenty-five thousand, seven hundred seventy-five".