155324121 has 16 divisors (see below), whose sum is σ = 219542400. Its totient is φ = 97342208.

The previous prime is 155324119. The next prime is 155324123. The reversal of 155324121 is 121423551.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (155324119) and next prime (155324123).

It is a cyclic number.

It is not a de Polignac number, because 155324121 - 2¹ = 155324119 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 155324091 and 155324100.

It is not an unprimeable number, because it can be changed into a prime (155324123) 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, 66115 + ... + 68423.

It is an arithmetic number, because the mean of its divisors is an integer number (13721400).

Almost surely, 2^155324121 is an apocalyptic number.

It is an amenable number.

155324121 is a deficient number, since it is larger than the sum of its proper divisors (64218279).

155324121 is a wasteful number, since it uses less digits than its factorization.

155324121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3648.

The product of its digits is 1200, while the sum is 24.

The square root of 155324121 is about 12462.9098127203. The cubic root of 155324121 is about 537.5426997626.

Adding to 155324121 its reverse (121423551), we get a palindrome (276747672).

The spelling of 155324121 in words is "one hundred fifty-five million, three hundred twenty-four thousand, one hundred twenty-one".