155129933 has 6 divisors (see below), whose sum is σ = 180457326. Its totient is φ = 132968472.

The previous prime is 155129831. The next prime is 155129951. The reversal of 155129933 is 339921551.

It is a happy number.

155129933 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 150749284 + 4380649 = 12278^2 + 2093^2 .

It is not a de Polignac number, because 155129933 - 2¹⁸ = 154867789 is a prime.

It is a super-2 number, since 2×155129933² = 48130592225168978, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155129633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1582910 + ... + 1583007.

It is an arithmetic number, because the mean of its divisors is an integer number (30076221).

Almost surely, 2^155129933 is an apocalyptic number.

It is an amenable number.

155129933 is a deficient number, since it is larger than the sum of its proper divisors (25327393).

155129933 is an equidigital number, since it uses as much as digits as its factorization.

155129933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165931 (or 3165924 counting only the distinct ones).

The product of its digits is 36450, while the sum is 38.

The square root of 155129933 is about 12455.1167397179. The cubic root of 155129933 is about 537.3185923238.

The spelling of 155129933 in words is "one hundred fifty-five million, one hundred twenty-nine thousand, nine hundred thirty-three".