145551253 has 4 divisors (see below), whose sum is σ = 145575468. Its totient is φ = 145527040.

The previous prime is 145551247. The next prime is 145551317. The reversal of 145551253 is 352155541.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 352155541 = 2207 ⋅159563.

It can be written as a sum of positive squares in 2 ways, for example, as 70174129 + 75377124 = 8377^2 + 8682^2 .

It is a cyclic number.

It is not a de Polignac number, because 145551253 - 2⁵ = 145551221 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 (145551233) 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, 4533 + ... + 17653.

It is an arithmetic number, because the mean of its divisors is an integer number (36393867).

Almost surely, 2^145551253 is an apocalyptic number.

It is an amenable number.

145551253 is a deficient number, since it is larger than the sum of its proper divisors (24215).

145551253 is a wasteful number, since it uses less digits than its factorization.

145551253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24214.

The product of its digits is 15000, while the sum is 31.

The square root of 145551253 is about 12064.4623999580. The cubic root of 145551253 is about 526.0237053608.

The spelling of 145551253 in words is "one hundred forty-five million, five hundred fifty-one thousand, two hundred fifty-three".