155120205 has 16 divisors (see below), whose sum is σ = 248351040. Its totient is φ = 82677888.

The previous prime is 155120201. The next prime is 155120219. The reversal of 155120205 is 502021551.

It is not a de Polignac number, because 155120205 - 2² = 155120201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155120201) 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, 36049 + ... + 40121.

It is an arithmetic number, because the mean of its divisors is an integer number (15521940).

Almost surely, 2^155120205 is an apocalyptic number.

155120205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155120205 is a deficient number, since it is larger than the sum of its proper divisors (93230835).

155120205 is a wasteful number, since it uses less digits than its factorization.

155120205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6620.

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

The square root of 155120205 is about 12454.7262113625. The cubic root of 155120205 is about 537.3073605681.

Adding to 155120205 its reverse (502021551), we get a palindrome (657141756).

The spelling of 155120205 in words is "one hundred fifty-five million, one hundred twenty thousand, two hundred five".