400222351 has 2 divisors, whose sum is σ = 400222352. Its totient is φ = 400222350.

The previous prime is 400222349. The next prime is 400222391. The reversal of 400222351 is 153222004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400222351 - 2¹ = 400222349 is a prime.

Together with 400222349, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400222321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200111175 + 200111176.

It is an arithmetic number, because the mean of its divisors is an integer number (200111176).

Almost surely, 2^400222351 is an apocalyptic number.

400222351 is a deficient number, since it is larger than the sum of its proper divisors (1).

400222351 is an equidigital number, since it uses as much as digits as its factorization.

400222351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 400222351 is about 20005.5580027151. The cubic root of 400222351 is about 736.9427991202.

Adding to 400222351 its reverse (153222004), we get a palindrome (553444355).

The spelling of 400222351 in words is "four hundred million, two hundred twenty-two thousand, three hundred fifty-one".