145013231 has 8 divisors (see below), whose sum is σ = 158419200. Its totient is φ = 131644440.

The previous prime is 145013227. The next prime is 145013237. The reversal of 145013231 is 132310541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145013231 - 2² = 145013227 is a prime.

It is a super-2 number, since 2×145013231² = 42057674330118722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145013237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791 + ... + 17048.

It is an arithmetic number, because the mean of its divisors is an integer number (19802400).

Almost surely, 2^145013231 is an apocalyptic number.

145013231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145013231 is a deficient number, since it is larger than the sum of its proper divisors (13405969).

145013231 is a wasteful number, since it uses less digits than its factorization.

145013231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18589.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 145013231 is about 12042.1439536322. The cubic root of 145013231 is about 525.3747661245.

Adding to 145013231 its reverse (132310541), we get a palindrome (277323772).

The spelling of 145013231 in words is "one hundred forty-five million, thirteen thousand, two hundred thirty-one".