155732133 has 4 divisors (see below), whose sum is σ = 207642848. Its totient is φ = 103821420.

The previous prime is 155732131. The next prime is 155732173. The reversal of 155732133 is 331237551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 331237551 = 3 ⋅110412517.

It is not a de Polignac number, because 155732133 - 2¹ = 155732131 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 155732133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155732131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25955353 + ... + 25955358.

It is an arithmetic number, because the mean of its divisors is an integer number (51910712).

Almost surely, 2^155732133 is an apocalyptic number.

It is an amenable number.

155732133 is a deficient number, since it is larger than the sum of its proper divisors (51910715).

155732133 is an equidigital number, since it uses as much as digits as its factorization.

155732133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51910714.

The product of its digits is 9450, while the sum is 30.

The square root of 155732133 is about 12479.2681275786. The cubic root of 155732133 is about 538.0129682294.

Adding to 155732133 its reverse (331237551), we get a palindrome (486969684).

The spelling of 155732133 in words is "one hundred fifty-five million, seven hundred thirty-two thousand, one hundred thirty-three".