145365231 has 16 divisors (see below), whose sum is σ = 218262528. Its totient is φ = 85257600.

The previous prime is 145365229. The next prime is 145365247. The reversal of 145365231 is 132563541.

145365231 = 2560² + 2561² + ... + 2581².

145365231 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 145365231 - 2¹ = 145365229 is a prime.

It is a super-2 number, since 2×145365231² = 42262100767366722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145365271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70026 + ... + 72071.

It is an arithmetic number, because the mean of its divisors is an integer number (13641408).

Almost surely, 2^145365231 is an apocalyptic number.

145365231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145365231 is a deficient number, since it is larger than the sum of its proper divisors (72897297).

145365231 is a wasteful number, since it uses less digits than its factorization.

145365231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142142.

The product of its digits is 10800, while the sum is 30.

The square root of 145365231 is about 12056.7504328488. The cubic root of 145365231 is about 525.7995146927.

The spelling of 145365231 in words is "one hundred forty-five million, three hundred sixty-five thousand, two hundred thirty-one".