145502251 has 12 divisors (see below), whose sum is σ = 155581504. Its totient is φ = 135928800.

The previous prime is 145502243. The next prime is 145502297. The reversal of 145502251 is 152205541.

It is not a de Polignac number, because 145502251 - 2³ = 145502243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145502221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23281 + ... + 28861.

Almost surely, 2^145502251 is an apocalyptic number.

145502251 is a deficient number, since it is larger than the sum of its proper divisors (10079253).

145502251 is an equidigital number, since it uses as much as digits as its factorization.

145502251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5670 (or 5641 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 145502251 is about 12062.4313884059. The cubic root of 145502251 is about 525.9646674933.

Adding to 145502251 its reverse (152205541), we get a palindrome (297707792).

The spelling of 145502251 in words is "one hundred forty-five million, five hundred two thousand, two hundred fifty-one".