155205151 has 4 divisors (see below), whose sum is σ = 155356432. Its totient is φ = 155053872.

The previous prime is 155205137. The next prime is 155205179. The reversal of 155205151 is 151502551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155205151 - 2⁷ = 155205023 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 (155205191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74091 + ... + 76156.

It is an arithmetic number, because the mean of its divisors is an integer number (38839108).

Almost surely, 2^155205151 is an apocalyptic number.

155205151 is a deficient number, since it is larger than the sum of its proper divisors (151281).

155205151 is a wasteful number, since it uses less digits than its factorization.

155205151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151280.

The product of its (nonzero) digits is 1250, while the sum is 25.

The square root of 155205151 is about 12458.1359360058. The cubic root of 155205151 is about 537.4054216860.

The spelling of 155205151 in words is "one hundred fifty-five million, two hundred five thousand, one hundred fifty-one".