400224427 has 2 divisors, whose sum is σ = 400224428. Its totient is φ = 400224426.

The previous prime is 400224413. The next prime is 400224431. The reversal of 400224427 is 724422004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400224427 is a prime.

It is not a weakly prime, because it can be changed into another prime (400224457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200112213 + 200112214.

It is an arithmetic number, because the mean of its divisors is an integer number (200112214).

Almost surely, 2^400224427 is an apocalyptic number.

400224427 is a deficient number, since it is larger than the sum of its proper divisors (1).

400224427 is an equidigital number, since it uses as much as digits as its factorization.

400224427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 25.

The square root of 400224427 is about 20005.6098882289. The cubic root of 400224427 is about 736.9440733207.

The spelling of 400224427 in words is "four hundred million, two hundred twenty-four thousand, four hundred twenty-seven".