155132291 has 4 divisors (see below), whose sum is σ = 155419584. Its totient is φ = 154845000.

The previous prime is 155132287. The next prime is 155132297. The reversal of 155132291 is 192231551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192231551 = 47 ⋅4090033.

It is a cyclic number.

It is not a de Polignac number, because 155132291 - 2² = 155132287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155132297) 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, 142835 + ... + 143916.

It is an arithmetic number, because the mean of its divisors is an integer number (38854896).

Almost surely, 2^155132291 is an apocalyptic number.

155132291 is a deficient number, since it is larger than the sum of its proper divisors (287293).

155132291 is an equidigital number, since it uses as much as digits as its factorization.

155132291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287292.

The product of its digits is 2700, while the sum is 29.

The square root of 155132291 is about 12455.2113992497. The cubic root of 155132291 is about 537.3213147531.

The spelling of 155132291 in words is "one hundred fifty-five million, one hundred thirty-two thousand, two hundred ninety-one".