155539441 has 4 divisors (see below), whose sum is σ = 160902900. Its totient is φ = 150175984.

The previous prime is 155539411. The next prime is 155539457. The reversal of 155539441 is 144935551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 86583025 + 68956416 = 9305^2 + 8304^2 .

It is a cyclic number.

It is not a de Polignac number, because 155539441 - 2¹⁷ = 155408369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155539441.

It is not an unprimeable number, because it can be changed into a prime (155539411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2681686 + ... + 2681743.

It is an arithmetic number, because the mean of its divisors is an integer number (40225725).

Almost surely, 2^155539441 is an apocalyptic number.

It is an amenable number.

155539441 is a deficient number, since it is larger than the sum of its proper divisors (5363459).

155539441 is an equidigital number, since it uses as much as digits as its factorization.

155539441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5363458.

The product of its digits is 54000, while the sum is 37.

The square root of 155539441 is about 12471.5452530951. The cubic root of 155539441 is about 537.7909768296.

It can be divided in two parts, 15 and 5539441, that added together give a triangular number (5539456 = T₃₃₂₈).

The spelling of 155539441 in words is "one hundred fifty-five million, five hundred thirty-nine thousand, four hundred forty-one".