155252133 has 20 divisors (see below), whose sum is σ = 232703328. Its totient is φ = 103151880.

The previous prime is 155252131. The next prime is 155252183. The reversal of 155252133 is 331252551.

It is a happy number.

155252133 is a `hidden beast` number, since 1 + 5 + 525 + 2 + 133 = 666.

It is not a de Polignac number, because 155252133 - 2¹ = 155252131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 155252097 and 155252106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155252131) 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 19 ways as a sum of consecutive naturals, for example, 22110 + ... + 28272.

Almost surely, 2^155252133 is an apocalyptic number.

It is an amenable number.

155252133 is a deficient number, since it is larger than the sum of its proper divisors (77451195).

155252133 is an equidigital number, since it uses as much as digits as its factorization.

155252133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6486 (or 6477 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 155252133 is about 12460.0213884247. The cubic root of 155252133 is about 537.4596420392.

The spelling of 155252133 in words is "one hundred fifty-five million, two hundred fifty-two thousand, one hundred thirty-three".