145310042321 has 4 divisors (see below), whose sum is σ = 151627870272. Its totient is φ = 138992214372.

The previous prime is 145310042309. The next prime is 145310042359. The reversal of 145310042321 is 123240013541.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123240013541 = 141209 ⋅872749.

It is a cyclic number.

It is not a de Polignac number, because 145310042321 - 2⁶ = 145310042257 is a prime.

It is a super-2 number, since 2×145310042321² (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 (145310042821) 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, 3158913941 + ... + 3158913986.

It is an arithmetic number, because the mean of its divisors is an integer number (37906967568).

Almost surely, 2^145310042321 is an apocalyptic number.

It is an amenable number.

145310042321 is a deficient number, since it is larger than the sum of its proper divisors (6317827951).

145310042321 is an equidigital number, since it uses as much as digits as its factorization.

145310042321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6317827950.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 145310042321 its reverse (123240013541), we get a palindrome (268550055862).

The spelling of 145310042321 in words is "one hundred forty-five billion, three hundred ten million, forty-two thousand, three hundred twenty-one".