145162364221 has 12 divisors (see below), whose sum is σ = 169719522588. Its totient is φ = 123793276992.

The previous prime is 145162364213. The next prime is 145162364273. The reversal of 145162364221 is 122463261541.

It can be written as a sum of positive squares in 2 ways, for example, as 70625720025 + 74536644196 = 265755^2 + 273014^2 .

It is not a de Polignac number, because 145162364221 - 2³ = 145162364213 is a prime.

It is a super-2 number, since 2×145162364221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145162364821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7509376 + ... + 7528681.

It is an arithmetic number, because the mean of its divisors is an integer number (14143293549).

Almost surely, 2^145162364221 is an apocalyptic number.

It is an amenable number.

145162364221 is a deficient number, since it is larger than the sum of its proper divisors (24557158367).

145162364221 is a wasteful number, since it uses less digits than its factorization.

145162364221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15038268 (or 15038261 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The spelling of 145162364221 in words is "one hundred forty-five billion, one hundred sixty-two million, three hundred sixty-four thousand, two hundred twenty-one".