145378231 has 2 divisors, whose sum is σ = 145378232. Its totient is φ = 145378230.

The previous prime is 145378223. The next prime is 145378241. The reversal of 145378231 is 132873541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145378231 - 2³ = 145378223 is a prime.

It is a super-2 number, since 2×145378231² = 42269660097378722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145378241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72689115 + 72689116.

It is an arithmetic number, because the mean of its divisors is an integer number (72689116).

Almost surely, 2^145378231 is an apocalyptic number.

145378231 is a deficient number, since it is larger than the sum of its proper divisors (1).

145378231 is an equidigital number, since it uses as much as digits as its factorization.

145378231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 145378231 is about 12057.2895378688. The cubic root of 145378231 is about 525.8151882938.

The spelling of 145378231 in words is "one hundred forty-five million, three hundred seventy-eight thousand, two hundred thirty-one".