145223522 has 8 divisors (see below), whose sum is σ = 217942572. Its totient is φ = 72576000.

The previous prime is 145223521. The next prime is 145223527. The reversal of 145223522 is 225322541.

It can be written as a sum of positive squares in 2 ways, for example, as 133656721 + 11566801 = 11561^2 + 3401^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 145223491 and 145223500.

It is not an unprimeable number, because it can be changed into a prime (145223521) 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, 12479 + ... + 21122.

Almost surely, 2^145223522 is an apocalyptic number.

145223522 is a deficient number, since it is larger than the sum of its proper divisors (72719050).

145223522 is a wasteful number, since it uses less digits than its factorization.

145223522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35764.

The product of its digits is 4800, while the sum is 26.

The square root of 145223522 is about 12050.8722505883. The cubic root of 145223522 is about 525.6286009463.

The spelling of 145223522 in words is "one hundred forty-five million, two hundred twenty-three thousand, five hundred twenty-two".