155021222241 has 12 divisors (see below), whose sum is σ = 223938192660. Its totient is φ = 103338874080.

The previous prime is 155021222141. The next prime is 155021222267. The reversal of 155021222241 is 142222120551.

155021222241 is a `hidden beast` number, since 15 + 502 + 122 + 2 + 24 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 127266995025 + 27754227216 = 356745^2 + 166596^2 .

It is not a de Polignac number, because 155021222241 - 2²⁷ = 154887004513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155021222141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 602250 + ... + 820211.

It is an arithmetic number, because the mean of its divisors is an integer number (18661516055).

Almost surely, 2^155021222241 is an apocalyptic number.

It is an amenable number.

155021222241 is a deficient number, since it is larger than the sum of its proper divisors (68916970419).

155021222241 is a wasteful number, since it uses less digits than its factorization.

155021222241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434576 (or 1434573 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 155021222241 its reverse (142222120551), we get a palindrome (297243342792).

The spelling of 155021222241 in words is "one hundred fifty-five billion, twenty-one million, two hundred twenty-two thousand, two hundred forty-one".