155870273 has 12 divisors (see below), whose sum is σ = 173919060. Its totient is φ = 138702816.

The previous prime is 155870237. The next prime is 155870293. The reversal of 155870273 is 372078551.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 50027329 + 105842944 = 7073^2 + 10288^2 .

It is not a de Polignac number, because 155870273 - 2¹⁸ = 155608129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155870293) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 242090 + ... + 242732.

It is an arithmetic number, because the mean of its divisors is an integer number (14493255).

Almost surely, 2^155870273 is an apocalyptic number.

155870273 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

155870273 is a deficient number, since it is larger than the sum of its proper divisors (18048787).

155870273 is an frugal number, since it uses more digits than its factorization.

155870273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 155870273 is about 12484.8016804433. The cubic root of 155870273 is about 538.1720001638.

The spelling of 155870273 in words is "one hundred fifty-five million, eight hundred seventy thousand, two hundred seventy-three".