145313251 has 4 divisors (see below), whose sum is σ = 145470600. Its totient is φ = 145155904.

The previous prime is 145313221. The next prime is 145313261. The reversal of 145313251 is 152313541.

It is a happy number.

145313251 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 is a cyclic number.

It is not a de Polignac number, because 145313251 - 2¹¹ = 145311203 is a prime.

It is a super-2 number, since 2×145313251² = 42231881832378002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145313221) 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, 77281 + ... + 79138.

It is an arithmetic number, because the mean of its divisors is an integer number (36367650).

Almost surely, 2^145313251 is an apocalyptic number.

145313251 is a deficient number, since it is larger than the sum of its proper divisors (157349).

145313251 is an equidigital number, since it uses as much as digits as its factorization.

145313251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157348.

The product of its digits is 1800, while the sum is 25.

The square root of 145313251 is about 12054.5946012299. The cubic root of 145313251 is about 525.7368350617.

Adding to 145313251 its reverse (152313541), we get a palindrome (297626792).

The spelling of 145313251 in words is "one hundred forty-five million, three hundred thirteen thousand, two hundred fifty-one".