400561222 has 4 divisors (see below), whose sum is σ = 600841836. Its totient is φ = 200280610.

The previous prime is 400561219. The next prime is 400561229. The reversal of 400561222 is 222165004.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 400561193 and 400561202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400561229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100140304 + ... + 100140307.

It is an arithmetic number, because the mean of its divisors is an integer number (150210459).

Almost surely, 2^400561222 is an apocalyptic number.

400561222 is a deficient number, since it is larger than the sum of its proper divisors (200280614).

400561222 is a wasteful number, since it uses less digits than its factorization.

400561222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200280613.

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

The square root of 400561222 is about 20014.0256320411. The cubic root of 400561222 is about 737.1507319468.

The spelling of 400561222 in words is "four hundred million, five hundred sixty-one thousand, two hundred twenty-two".