155012205 has 64 divisors (see below), whose sum is σ = 274019328. Its totient is φ = 74511360.

The previous prime is 155012177. The next prime is 155012213. The reversal of 155012205 is 502210551.

It is not a de Polignac number, because 155012205 - 2⁵ = 155012173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 734550 + ... + 734760.

It is an arithmetic number, because the mean of its divisors is an integer number (4281552).

Almost surely, 2^155012205 is an apocalyptic number.

155012205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155012205 is a deficient number, since it is larger than the sum of its proper divisors (119007123).

155012205 is a wasteful number, since it uses less digits than its factorization.

155012205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 155012205 is about 12450.3897529354. The cubic root of 155012205 is about 537.1826343545.

Adding to 155012205 its reverse (502210551), we get a palindrome (657222756).

The spelling of 155012205 in words is "one hundred fifty-five million, twelve thousand, two hundred five".