145331569 has 2 divisors, whose sum is σ = 145331570. Its totient is φ = 145331568.

The previous prime is 145331507. The next prime is 145331629. The reversal of 145331569 is 965133541.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111830625 + 33500944 = 10575^2 + 5788^2 .

It is an emirp because it is prime and its reverse (965133541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145331569 - 2¹¹ = 145329521 is a prime.

It is a super-2 number, since 2×145331569² = 42242529896003522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145331369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72665784 + 72665785.

It is an arithmetic number, because the mean of its divisors is an integer number (72665785).

Almost surely, 2^145331569 is an apocalyptic number.

It is an amenable number.

145331569 is a deficient number, since it is larger than the sum of its proper divisors (1).

145331569 is an equidigital number, since it uses as much as digits as its factorization.

145331569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 37.

The square root of 145331569 is about 12055.3543705691. The cubic root of 145331569 is about 525.7589253681.

The spelling of 145331569 in words is "one hundred forty-five million, three hundred thirty-one thousand, five hundred sixty-nine".