400122422251 has 4 divisors (see below), whose sum is σ = 400314513832. Its totient is φ = 399930330672.

The previous prime is 400122422221. The next prime is 400122422257. The reversal of 400122422251 is 152224221004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400122422251 - 2⁹ = 400122421739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400122422257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96042666 + ... + 96046831.

It is an arithmetic number, because the mean of its divisors is an integer number (100078628458).

Almost surely, 2^400122422251 is an apocalyptic number.

400122422251 is a deficient number, since it is larger than the sum of its proper divisors (192091581).

400122422251 is a wasteful number, since it uses less digits than its factorization.

400122422251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192091580.

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 400122422251 its reverse (152224221004), we get a palindrome (552346643255).

The spelling of 400122422251 in words is "four hundred billion, one hundred twenty-two million, four hundred twenty-two thousand, two hundred fifty-one".