155165261 has 8 divisors (see below), whose sum is σ = 160320000. Its totient is φ = 150019920.

The previous prime is 155165251. The next prime is 155165281. The reversal of 155165261 is 162561551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155165261 - 2¹⁰ = 155164237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155165201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50240 + ... + 53238.

It is an arithmetic number, because the mean of its divisors is an integer number (20040000).

Almost surely, 2^155165261 is an apocalyptic number.

It is an amenable number.

155165261 is a deficient number, since it is larger than the sum of its proper divisors (5154739).

155165261 is a wasteful number, since it uses less digits than its factorization.

155165261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4699.

The product of its digits is 9000, while the sum is 32.

The square root of 155165261 is about 12456.5348713035. The cubic root of 155165261 is about 537.3593773829.

The spelling of 155165261 in words is "one hundred fifty-five million, one hundred sixty-five thousand, two hundred sixty-one".