145221116522 has 8 divisors (see below), whose sum is σ = 217943446500. Its totient is φ = 72573301024.

The previous prime is 145221116497. The next prime is 145221116539. The reversal of 145221116522 is 225611122541.

It can be written as a sum of positive squares in 2 ways, for example, as 140414328961 + 4806787561 = 374719^2 + 69331^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18623747 + ... + 18631542.

Almost surely, 2^145221116522 is an apocalyptic number.

145221116522 is a deficient number, since it is larger than the sum of its proper divisors (72722329978).

145221116522 is a wasteful number, since it uses less digits than its factorization.

145221116522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37257240.

The product of its digits is 9600, while the sum is 32.

The spelling of 145221116522 in words is "one hundred forty-five billion, two hundred twenty-one million, one hundred sixteen thousand, five hundred twenty-two".