145220271 has 24 divisors (see below), whose sum is σ = 230042880. Its totient is φ = 81213552.

The previous prime is 145220269. The next prime is 145220329. The reversal of 145220271 is 172022541.

It is not a de Polignac number, because 145220271 - 2¹ = 145220269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145220221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3601 + ... + 17418.

It is an arithmetic number, because the mean of its divisors is an integer number (9585120).

Almost surely, 2^145220271 is an apocalyptic number.

145220271 is a deficient number, since it is larger than the sum of its proper divisors (84822609).

145220271 is a wasteful number, since it uses less digits than its factorization.

145220271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21083 (or 21076 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 145220271 is about 12050.7373633318. The cubic root of 145220271 is about 525.6246786447.

It can be divided in two parts, 1452 and 20271, that multiplied together give a palindrome (29433492).

The spelling of 145220271 in words is "one hundred forty-five million, two hundred twenty thousand, two hundred seventy-one".