400025222 has 8 divisors (see below), whose sum is σ = 600463776. Its totient is φ = 199870632.

The previous prime is 400025203. The next prime is 400025237. The reversal of 400025222 is 222520004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×400025222² = 320040356472298568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400025222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67433 + ... + 73124.

It is an arithmetic number, because the mean of its divisors is an integer number (75057972).

Almost surely, 2^400025222 is an apocalyptic number.

400025222 is a deficient number, since it is larger than the sum of its proper divisors (200438554).

400025222 is a wasteful number, since it uses less digits than its factorization.

400025222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141982.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 400025222 is about 20000.6305400605. The cubic root of 400025222 is about 736.8217858430.

Adding to 400025222 its reverse (222520004), we get a palindrome (622545226).

The spelling of 400025222 in words is "four hundred million, twenty-five thousand, two hundred twenty-two".