145222253 has 16 divisors (see below), whose sum is σ = 165773952. Its totient is φ = 125928000.

The previous prime is 145222249. The next prime is 145222291. The reversal of 145222253 is 352222541.

It is not a de Polignac number, because 145222253 - 2² = 145222249 is a prime.

It is a super-4 number, since 4×145222253⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145222243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136343 + ... + 137403.

It is an arithmetic number, because the mean of its divisors is an integer number (10360872).

Almost surely, 2^145222253 is an apocalyptic number.

It is an amenable number.

145222253 is a deficient number, since it is larger than the sum of its proper divisors (20551699).

145222253 is a wasteful number, since it uses less digits than its factorization.

145222253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636.

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

The square root of 145222253 is about 12050.8195986829. The cubic root of 145222253 is about 525.6270699164.

Adding to 145222253 its reverse (352222541), we get a palindrome (497444794).

It can be divided in two parts, 1 and 45222253, that added together give a palindrome (45222254).

The spelling of 145222253 in words is "one hundred forty-five million, two hundred twenty-two thousand, two hundred fifty-three".