400031222022 has 40 divisors (see below), whose sum is σ = 896403307800. Its totient is φ = 133338229056.

The previous prime is 400031221987. The next prime is 400031222023. The reversal of 400031222022 is 220222130004.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 400031221986 and 400031222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400031222023) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6352929 + ... + 6415587.

It is an arithmetic number, because the mean of its divisors is an integer number (22410082695).

Almost surely, 2^400031222022 is an apocalyptic number.

400031222022 is an abundant number, since it is smaller than the sum of its proper divisors (496372085778).

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

400031222022 is a wasteful number, since it uses less digits than its factorization.

400031222022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102082 (or 102073 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 400031222022 its reverse (220222130004), we get a palindrome (620253352026).

The spelling of 400031222022 in words is "four hundred billion, thirty-one million, two hundred twenty-two thousand, twenty-two".