145223315 has 4 divisors (see below), whose sum is σ = 174267984. Its totient is φ = 116178648.

The previous prime is 145223303. The next prime is 145223321. The reversal of 145223315 is 513322541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 513322541 = 89 ⋅5767669.

It is a cyclic number.

It is not a de Polignac number, because 145223315 - 2⁸ = 145223059 is a prime.

It is a super-2 number, since 2×145223315² = 42179622439178450, which contains 22 as substring.

It is a Duffinian number.

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, 14522327 + ... + 14522336.

It is an arithmetic number, because the mean of its divisors is an integer number (43566996).

Almost surely, 2^145223315 is an apocalyptic number.

145223315 is a deficient number, since it is larger than the sum of its proper divisors (29044669).

145223315 is an equidigital number, since it uses as much as digits as its factorization.

145223315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29044668.

The product of its digits is 3600, while the sum is 26.

The square root of 145223315 is about 12050.8636619954. The cubic root of 145223315 is about 525.6283512044.

Adding to 145223315 its reverse (513322541), we get a palindrome (658545856).

The spelling of 145223315 in words is "one hundred forty-five million, two hundred twenty-three thousand, three hundred fifteen".