145431131331 has 8 divisors (see below), whose sum is σ = 193951102720. Its totient is φ = 96932623752.

The previous prime is 145431131323. The next prime is 145431131333. The reversal of 145431131331 is 133131134541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145431131331 - 2³ = 145431131323 is a prime.

It is a super-2 number, since 2×145431131331² (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 (145431131333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5350135 + ... + 5377248.

It is an arithmetic number, because the mean of its divisors is an integer number (24243887840).

Almost surely, 2^145431131331 is an apocalyptic number.

145431131331 is a deficient number, since it is larger than the sum of its proper divisors (48519971389).

145431131331 is a wasteful number, since it uses less digits than its factorization.

145431131331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10731905.

The product of its digits is 6480, while the sum is 30.

Adding to 145431131331 its reverse (133131134541), we get a palindrome (278562265872).

The spelling of 145431131331 in words is "one hundred forty-five billion, four hundred thirty-one million, one hundred thirty-one thousand, three hundred thirty-one".