145154531321231 has 4 divisors (see below), whose sum is σ = 145155622735032. Its totient is φ = 145153439907432.

The previous prime is 145154531321183. The next prime is 145154531321251. The reversal of 145154531321231 is 132123135451541.

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 145154531321231 - 2²⁶ = 145154464212367 is a prime.

It is a super-2 number, since 2×145154531321231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145154531321251) 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, 545507381 + ... + 545773406.

It is an arithmetic number, because the mean of its divisors is an integer number (36288905683758).

Almost surely, 2^{145154531321231} is an apocalyptic number.

145154531321231 is a deficient number, since it is larger than the sum of its proper divisors (1091413801).

145154531321231 is a wasteful number, since it uses less digits than its factorization.

145154531321231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091413800.

The product of its digits is 216000, while the sum is 41.

Adding to 145154531321231 its reverse (132123135451541), we get a palindrome (277277666772772).

The spelling of 145154531321231 in words is "one hundred forty-five trillion, one hundred fifty-four billion, five hundred thirty-one million, three hundred twenty-one thousand, two hundred thirty-one".