155151161 has 6 divisors (see below), whose sum is σ = 170538186. Its totient is φ = 141046400.

The previous prime is 155151109. The next prime is 155151211. The reversal of 155151161 is 161151551.

It can be written as a sum of positive squares in only one way, i.e., 152053561 + 3097600 = 12331^2 + 1760^2 .

It is not a de Polignac number, because 155151161 - 2⁶ = 155151097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155151161.

It is not an unprimeable number, because it can be changed into a prime (155151461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 641000 + ... + 641241.

It is an arithmetic number, because the mean of its divisors is an integer number (28423031).

Almost surely, 2^155151161 is an apocalyptic number.

155151161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

155151161 is a deficient number, since it is larger than the sum of its proper divisors (15387025).

155151161 is a wasteful number, since it uses less digits than its factorization.

155151161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282263 (or 1282252 counting only the distinct ones).

The product of its digits is 750, while the sum is 26.

The square root of 155151161 is about 12455.9688904557. The cubic root of 155151161 is about 537.3431001210.

The spelling of 155151161 in words is "one hundred fifty-five million, one hundred fifty-one thousand, one hundred sixty-one".