145353231 has 8 divisors (see below), whose sum is σ = 215338160. Its totient is φ = 96902136.

The previous prime is 145353227. The next prime is 145353233. The reversal of 145353231 is 132353541.

145353231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145353231 - 2² = 145353227 is a prime.

It is a super-2 number, since 2×145353231² = 42255123524278722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5383453 = 145353231 / (1 + 4 + 5 + 3 + 5 + 3 + 2 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145353195 and 145353204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145353233) 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, 2691700 + ... + 2691753.

It is an arithmetic number, because the mean of its divisors is an integer number (26917270).

Almost surely, 2^145353231 is an apocalyptic number.

145353231 is a deficient number, since it is larger than the sum of its proper divisors (69984929).

145353231 is an equidigital number, since it uses as much as digits as its factorization.

145353231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5383462 (or 5383456 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 145353231 is about 12056.2527760494. The cubic root of 145353231 is about 525.7850459238.

It can be divided in two parts, 14535 and 3231, that added together give a triangular number (17766 = T₁₈₈).

The spelling of 145353231 in words is "one hundred forty-five million, three hundred fifty-three thousand, two hundred thirty-one".