155442545 has 4 divisors (see below), whose sum is σ = 186531060. Its totient is φ = 124354032.

The previous prime is 155442541. The next prime is 155442557. The reversal of 155442545 is 545244551.

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 41977441 + 113465104 = 6479^2 + 10652^2 .

It is a cyclic number.

It is not a de Polignac number, because 155442545 - 2² = 155442541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155442541) 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, 15544250 + ... + 15544259.

It is an arithmetic number, because the mean of its divisors is an integer number (46632765).

Almost surely, 2^155442545 is an apocalyptic number.

It is an amenable number.

155442545 is a deficient number, since it is larger than the sum of its proper divisors (31088515).

155442545 is an equidigital number, since it uses as much as digits as its factorization.

155442545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31088514.

The product of its digits is 80000, while the sum is 35.

The square root of 155442545 is about 12467.6599648852. The cubic root of 155442545 is about 537.6792782173.

The spelling of 155442545 in words is "one hundred fifty-five million, four hundred forty-two thousand, five hundred forty-five".