400131222 has 32 divisors (see below), whose sum is σ = 843417600. Its totient is φ = 126201888.

The previous prime is 400131217. The next prime is 400131223. The reversal of 400131222 is 222131004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400131223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122304 + ... + 125532.

It is an arithmetic number, because the mean of its divisors is an integer number (26356800).

Almost surely, 2^400131222 is an apocalyptic number.

400131222 is an abundant number, since it is smaller than the sum of its proper divisors (443286378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400131222 is a wasteful number, since it uses less digits than its factorization.

400131222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4340.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 400131222 is about 20003.2802809939. The cubic root of 400131222 is about 736.8868619160.

Adding to 400131222 its reverse (222131004), we get a palindrome (622262226).

The spelling of 400131222 in words is "four hundred million, one hundred thirty-one thousand, two hundred twenty-two".