145531241123 has 4 divisors (see below), whose sum is σ = 145542320448. Its totient is φ = 145520161800.

The previous prime is 145531241117. The next prime is 145531241137. The reversal of 145531241123 is 321142135541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145531241123 - 2²⁴ = 145514463907 is a prime.

It is a super-2 number, since 2×145531241123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145531241123.

It is not an unprimeable number, because it can be changed into a prime (145531247123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5519936 + ... + 5546237.

It is an arithmetic number, because the mean of its divisors is an integer number (36385580112).

Almost surely, 2^145531241123 is an apocalyptic number.

145531241123 is a deficient number, since it is larger than the sum of its proper divisors (11079325).

145531241123 is a wasteful number, since it uses less digits than its factorization.

145531241123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11079324.

The product of its digits is 14400, while the sum is 32.

Adding to 145531241123 its reverse (321142135541), we get a palindrome (466673376664).

The spelling of 145531241123 in words is "one hundred forty-five billion, five hundred thirty-one million, two hundred forty-one thousand, one hundred twenty-three".