155040220441 has 2 divisors, whose sum is σ = 155040220442. Its totient is φ = 155040220440.

The previous prime is 155040220421. The next prime is 155040220451. The reversal of 155040220441 is 144022040551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136293134041 + 18747086400 = 369179^2 + 136920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155040220441 is a prime.

It is not a weakly prime, because it can be changed into another prime (155040220421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77520110220 + 77520110221.

It is an arithmetic number, because the mean of its divisors is an integer number (77520110221).

Almost surely, 2^155040220441 is an apocalyptic number.

It is an amenable number.

155040220441 is a deficient number, since it is larger than the sum of its proper divisors (1).

155040220441 is an equidigital number, since it uses as much as digits as its factorization.

155040220441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 155040220441 its reverse (144022040551), we get a palindrome (299062260992).

The spelling of 155040220441 in words is "one hundred fifty-five billion, forty million, two hundred twenty thousand, four hundred forty-one".