145213253 has 4 divisors (see below), whose sum is σ = 145241100. Its totient is φ = 145185408.

The previous prime is 145213199. The next prime is 145213291. The reversal of 145213253 is 352312541.

It is a happy number.

145213253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108513889 + 36699364 = 10417^2 + 6058^2 .

It is a cyclic number.

It is not a de Polignac number, because 145213253 - 2¹⁰ = 145212229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145213553) 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, 3500 + ... + 17397.

It is an arithmetic number, because the mean of its divisors is an integer number (36310275).

Almost surely, 2^145213253 is an apocalyptic number.

It is an amenable number.

145213253 is a deficient number, since it is larger than the sum of its proper divisors (27847).

145213253 is an equidigital number, since it uses as much as digits as its factorization.

145213253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27846.

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

The square root of 145213253 is about 12050.4461743124. The cubic root of 145213253 is about 525.6162112928.

Adding to 145213253 its reverse (352312541), we get a palindrome (497525794).

The spelling of 145213253 in words is "one hundred forty-five million, two hundred thirteen thousand, two hundred fifty-three".