20150155 has 16 divisors (see below), whose sum is σ = 25325568. Its totient is φ = 15372000.

The previous prime is 20150153. The next prime is 20150161. The reversal of 20150155 is 55105102.

It is not a de Polignac number, because 20150155 - 2¹ = 20150153 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (20150153) 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, 10090 + ... + 11920.

It is an arithmetic number, because the mean of its divisors is an integer number (1582848).

Almost surely, 2^20150155 is an apocalyptic number.

20150155 is a deficient number, since it is larger than the sum of its proper divisors (5175413).

20150155 is a wasteful number, since it uses less digits than its factorization.

20150155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 20150155 is about 4488.8924023639. The cubic root of 20150155 is about 272.1193743247.

Adding to 20150155 its reverse (55105102), we get a palindrome (75255257).

The spelling of 20150155 in words is "twenty million, one hundred fifty thousand, one hundred fifty-five".