40420244233 has 2 divisors, whose sum is σ = 40420244234. Its totient is φ = 40420244232.

The previous prime is 40420244177. The next prime is 40420244237. The reversal of 40420244233 is 33244202404.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34760992249 + 5659251984 = 186443^2 + 75228^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40420244233 is a prime.

It is a super-2 number, since 2×40420244233² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40420244237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20210122116 + 20210122117.

It is an arithmetic number, because the mean of its divisors is an integer number (20210122117).

Almost surely, 2^40420244233 is an apocalyptic number.

It is an amenable number.

40420244233 is a deficient number, since it is larger than the sum of its proper divisors (1).

40420244233 is an equidigital number, since it uses as much as digits as its factorization.

40420244233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 40420244233 its reverse (33244202404), we get a palindrome (73664446637).

The spelling of 40420244233 in words is "forty billion, four hundred twenty million, two hundred forty-four thousand, two hundred thirty-three".