155273109 has 16 divisors (see below), whose sum is σ = 212575104. Its totient is φ = 100755200.

The previous prime is 155273099. The next prime is 155273113. The reversal of 155273109 is 901372551.

It is a cyclic number.

It is not a de Polignac number, because 155273109 - 2⁷ = 155272981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155273109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155273159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62872 + ... + 65294.

It is an arithmetic number, because the mean of its divisors is an integer number (13285944).

Almost surely, 2^155273109 is an apocalyptic number.

It is an amenable number.

155273109 is a deficient number, since it is larger than the sum of its proper divisors (57301995).

155273109 is a wasteful number, since it uses less digits than its factorization.

155273109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988.

The product of its (nonzero) digits is 9450, while the sum is 33.

The square root of 155273109 is about 12460.8630920976. The cubic root of 155273109 is about 537.4838462064.

The spelling of 155273109 in words is "one hundred fifty-five million, two hundred seventy-three thousand, one hundred nine".