155438441 has 2 divisors, whose sum is σ = 155438442. Its totient is φ = 155438440.

The previous prime is 155438401. The next prime is 155438461. The reversal of 155438441 is 144834551.

155438441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101929216 + 53509225 = 10096^2 + 7315^2 .

It is an emirp because it is prime and its reverse (144834551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155438441 - 2¹⁰ = 155437417 is a prime.

It is a super-2 number, since 2×155438441² = 48322217881020962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155438401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77719220 + 77719221.

It is an arithmetic number, because the mean of its divisors is an integer number (77719221).

Almost surely, 2^155438441 is an apocalyptic number.

It is an amenable number.

155438441 is a deficient number, since it is larger than the sum of its proper divisors (1).

155438441 is an equidigital number, since it uses as much as digits as its factorization.

155438441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38400, while the sum is 35.

The square root of 155438441 is about 12467.4953779819. The cubic root of 155438441 is about 537.6745462327.

The spelling of 155438441 in words is "one hundred fifty-five million, four hundred thirty-eight thousand, four hundred forty-one".