145222523 has 4 divisors (see below), whose sum is σ = 145533960. Its totient is φ = 144911088.

The previous prime is 145222501. The next prime is 145222537. The reversal of 145222523 is 325222541.

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 145222523 - 2¹² = 145218427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145222492 and 145222501.

It is not an unprimeable number, because it can be changed into a prime (145222543) 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, 155018 + ... + 155951.

It is an arithmetic number, because the mean of its divisors is an integer number (36383490).

Almost surely, 2^145222523 is an apocalyptic number.

145222523 is a deficient number, since it is larger than the sum of its proper divisors (311437).

145222523 is an equidigital number, since it uses as much as digits as its factorization.

145222523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311436.

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

The square root of 145222523 is about 12050.8308012352. The cubic root of 145222523 is about 525.6273956682.

The spelling of 145222523 in words is "one hundred forty-five million, two hundred twenty-two thousand, five hundred twenty-three".