155132215 has 16 divisors (see below), whose sum is σ = 219617280. Its totient is φ = 102944160.

The previous prime is 155132213. The next prime is 155132239. The reversal of 155132215 is 512231551.

It is not a de Polignac number, because 155132215 - 2¹ = 155132213 is a prime.

It is a super-3 number, since 3×155132215³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155132215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155132213) 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, 70405 + ... + 72574.

It is an arithmetic number, because the mean of its divisors is an integer number (13726080).

Almost surely, 2^155132215 is an apocalyptic number.

155132215 is a deficient number, since it is larger than the sum of its proper divisors (64485065).

155132215 is a wasteful number, since it uses less digits than its factorization.

155132215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143022.

The product of its digits is 1500, while the sum is 25.

The square root of 155132215 is about 12455.2083483176. The cubic root of 155132215 is about 537.3212270077.

Adding to 155132215 its reverse (512231551), we get a palindrome (667363766).

The spelling of 155132215 in words is "one hundred fifty-five million, one hundred thirty-two thousand, two hundred fifteen".