155101 has 4 divisors (see below), whose sum is σ = 158752. Its totient is φ = 151452.

The previous prime is 155087. The next prime is 155119. The reversal of 155101 is 101551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 101551 = 173 ⋅587.

It is a cyclic number.

It is not a de Polignac number, because 155101 - 2⁵ = 155069 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1761 + ... + 1846.

It is an arithmetic number, because the mean of its divisors is an integer number (39688).

2¹⁵⁵¹⁰¹ is an apocalyptic number.

It is an amenable number.

155101 is a deficient number, since it is larger than the sum of its proper divisors (3651).

155101 is an equidigital number, since it uses as much as digits as its factorization.

155101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3650.

The product of its (nonzero) digits is 25, while the sum is 13.

The square root of 155101 is about 393.8286429400. The cubic root of 155101 is about 53.7285185478.

Adding to 155101 its reverse (101551), we get a palindrome (256652).

It can be divided in two parts, 155 and 101, that added together give a 8-th power (256 = 2⁸).

The spelling of 155101 in words is "one hundred fifty-five thousand, one hundred one".