145231503 has 4 divisors (see below), whose sum is σ = 193642008. Its totient is φ = 96821000.

The previous prime is 145231487. The next prime is 145231531. The reversal of 145231503 is 305132541.

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 145231503 - 2⁴ = 145231487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145231543) 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, 24205248 + ... + 24205253.

It is an arithmetic number, because the mean of its divisors is an integer number (48410502).

Almost surely, 2^145231503 is an apocalyptic number.

145231503 is a deficient number, since it is larger than the sum of its proper divisors (48410505).

145231503 is an equidigital number, since it uses as much as digits as its factorization.

145231503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48410504.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 145231503 is about 12051.2033838949. The cubic root of 145231503 is about 525.6382297010.

The spelling of 145231503 in words is "one hundred forty-five million, two hundred thirty-one thousand, five hundred three".