145414431405221 has 8 divisors (see below), whose sum is σ = 160416328824000. Its totient is φ = 130709601262240.

The previous prime is 145414431405209. The next prime is 145414431405227. The reversal of 145414431405221 is 122504134414541.

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

It is not a de Polignac number, because 145414431405221 - 2⁴² = 141016384894117 is a prime.

It is a super-2 number, since 2×145414431405221² (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 (145414431405227) 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, 74266817921 + ... + 74266819878.

It is an arithmetic number, because the mean of its divisors is an integer number (20052041103000).

Almost surely, 2^{145414431405221} is an apocalyptic number.

145414431405221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145414431405221 is a deficient number, since it is larger than the sum of its proper divisors (15001897418779).

145414431405221 is a wasteful number, since it uses less digits than its factorization.

145414431405221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148533637899.

The product of its (nonzero) digits is 307200, while the sum is 41.

Adding to 145414431405221 its reverse (122504134414541), we get a palindrome (267918565819762).

The spelling of 145414431405221 in words is "one hundred forty-five trillion, four hundred fourteen billion, four hundred thirty-one million, four hundred five thousand, two hundred twenty-one".