155133441 has 16 divisors (see below), whose sum is σ = 237753600. Its totient is φ = 99855504.

The previous prime is 155133439. The next prime is 155133467. The reversal of 155133441 is 144331551.

It is a happy number.

It is not a de Polignac number, because 155133441 - 2¹ = 155133439 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (155133401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98281 + ... + 99846.

It is an arithmetic number, because the mean of its divisors is an integer number (14859600).

Almost surely, 2^155133441 is an apocalyptic number.

It is an amenable number.

155133441 is a deficient number, since it is larger than the sum of its proper divisors (82620159).

155133441 is a wasteful number, since it uses less digits than its factorization.

155133441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198165 (or 198159 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 155133441 is about 12455.2575645789. The cubic root of 155133441 is about 537.3226424757.

Adding to 155133441 its reverse (144331551), we get a palindrome (299464992).

The spelling of 155133441 in words is "one hundred fifty-five million, one hundred thirty-three thousand, four hundred forty-one".