40020222251 has 2 divisors, whose sum is σ = 40020222252. Its totient is φ = 40020222250.

The previous prime is 40020222217. The next prime is 40020222269. The reversal of 40020222251 is 15222202004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40020222251 - 2³⁰ = 38946480427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (40020222211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010111125 + 20010111126.

It is an arithmetic number, because the mean of its divisors is an integer number (20010111126).

Almost surely, 2^40020222251 is an apocalyptic number.

40020222251 is a deficient number, since it is larger than the sum of its proper divisors (1).

40020222251 is an equidigital number, since it uses as much as digits as its factorization.

40020222251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 40020222251 its reverse (15222202004), we get a palindrome (55242424255).

The spelling of 40020222251 in words is "forty billion, twenty million, two hundred twenty-two thousand, two hundred fifty-one".