400222039981 has 2 divisors, whose sum is σ = 400222039982. Its totient is φ = 400222039980.

The previous prime is 400222039951. The next prime is 400222040017. The reversal of 400222039981 is 189930222004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275005848100 + 125216191881 = 524410^2 + 353859^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400222039981 is a prime.

It is a super-2 number, since 2×400222039981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400222039951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200111019990 + 200111019991.

It is an arithmetic number, because the mean of its divisors is an integer number (200111019991).

Almost surely, 2^400222039981 is an apocalyptic number.

It is an amenable number.

400222039981 is a deficient number, since it is larger than the sum of its proper divisors (1).

400222039981 is an equidigital number, since it uses as much as digits as its factorization.

400222039981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 400222039981 in words is "four hundred billion, two hundred twenty-two million, thirty-nine thousand, nine hundred eighty-one".