400221142457 has 2 divisors, whose sum is σ = 400221142458. Its totient is φ = 400221142456.

The previous prime is 400221142427. The next prime is 400221142459. The reversal of 400221142457 is 754241122004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219076419136 + 181144723321 = 468056^2 + 425611^2 .

It is a cyclic number.

It is not a de Polignac number, because 400221142457 - 2⁶ = 400221142393 is a prime.

Together with 400221142459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (400221142459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200110571228 + 200110571229.

It is an arithmetic number, because the mean of its divisors is an integer number (200110571229).

Almost surely, 2^400221142457 is an apocalyptic number.

It is an amenable number.

400221142457 is a deficient number, since it is larger than the sum of its proper divisors (1).

400221142457 is an equidigital number, since it uses as much as digits as its factorization.

400221142457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 32.

The spelling of 400221142457 in words is "four hundred billion, two hundred twenty-one million, one hundred forty-two thousand, four hundred fifty-seven".