155450273 has 6 divisors (see below), whose sum is σ = 170866962. Its totient is φ = 141318320.

The previous prime is 155450263. The next prime is 155450279. The reversal of 155450273 is 372054551.

It can be written as a sum of positive squares in only one way, i.e., 155326369 + 123904 = 12463^2 + 352^2 .

It is not a de Polignac number, because 155450273 - 2⁸ = 155450017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155450279) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 642236 + ... + 642477.

It is an arithmetic number, because the mean of its divisors is an integer number (28477827).

Almost surely, 2^155450273 is an apocalyptic number.

It is an amenable number.

155450273 is a deficient number, since it is larger than the sum of its proper divisors (15416689).

155450273 is a wasteful number, since it uses less digits than its factorization.

155450273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284735 (or 1284724 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 155450273 is about 12467.9698828638. The cubic root of 155450273 is about 537.6881885119.

The spelling of 155450273 in words is "one hundred fifty-five million, four hundred fifty thousand, two hundred seventy-three".