145221606140243 has 4 divisors (see below), whose sum is σ = 145221636733440. Its totient is φ = 145221575547048.

The previous prime is 145221606140239. The next prime is 145221606140269. The reversal of 145221606140243 is 342041606122541.

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 145221606140243 - 2² = 145221606140239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145221606140243.

It is not an unprimeable number, because it can be changed into a prime (145221606100243) 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, 6483923 + ... + 18234156.

It is an arithmetic number, because the mean of its divisors is an integer number (36305409183360).

Almost surely, 2^{145221606140243} is an apocalyptic number.

145221606140243 is a deficient number, since it is larger than the sum of its proper divisors (30593197).

145221606140243 is an equidigital number, since it uses as much as digits as its factorization.

145221606140243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30593196.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 145221606140243 in words is "one hundred forty-five trillion, two hundred twenty-one billion, six hundred six million, one hundred forty thousand, two hundred forty-three".