145423331401 has 4 divisors (see below), whose sum is σ = 145455789204. Its totient is φ = 145390873600.

The previous prime is 145423331399. The next prime is 145423331411. The reversal of 145423331401 is 104133324541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104133324541 = 61 ⋅1707103681.

It can be written as a sum of positive squares in 2 ways, for example, as 77250643600 + 68172687801 = 277940^2 + 261099^2 .

It is a cyclic number.

It is not a de Polignac number, because 145423331401 - 2¹ = 145423331399 is a prime.

It is a super-2 number, since 2×145423331401² (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 (145423331411) 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, 16222180 + ... + 16231141.

It is an arithmetic number, because the mean of its divisors is an integer number (36363947301).

Almost surely, 2^145423331401 is an apocalyptic number.

It is an amenable number.

145423331401 is a deficient number, since it is larger than the sum of its proper divisors (32457803).

145423331401 is an equidigital number, since it uses as much as digits as its factorization.

145423331401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32457802.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 145423331401 its reverse (104133324541), we get a palindrome (249556655942).

The spelling of 145423331401 in words is "one hundred forty-five billion, four hundred twenty-three million, three hundred thirty-one thousand, four hundred one".