155244521113 has 4 divisors (see below), whose sum is σ = 169357659408. Its totient is φ = 141131382820.

The previous prime is 155244521083. The next prime is 155244521123. The reversal of 155244521113 is 311125442551.

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.

It is a cyclic number.

It is not a de Polignac number, because 155244521113 - 2²⁵ = 155210966681 is a prime.

It is a super-2 number, since 2×155244521113² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155244521123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7056569131 + ... + 7056569152.

It is an arithmetic number, because the mean of its divisors is an integer number (42339414852).

Almost surely, 2^155244521113 is an apocalyptic number.

It is an amenable number.

155244521113 is a deficient number, since it is larger than the sum of its proper divisors (14113138295).

155244521113 is a wasteful number, since it uses less digits than its factorization.

155244521113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14113138294.

The product of its digits is 24000, while the sum is 34.

Adding to 155244521113 its reverse (311125442551), we get a palindrome (466369963664).

The spelling of 155244521113 in words is "one hundred fifty-five billion, two hundred forty-four million, five hundred twenty-one thousand, one hundred thirteen".