145142142181 has 2 divisors, whose sum is σ = 145142142182. Its totient is φ = 145142142180.

The previous prime is 145142142107. The next prime is 145142142203. The reversal of 145142142181 is 181241241541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145135093156 + 7049025 = 380966^2 + 2655^2 .

It is an emirp because it is prime and its reverse (181241241541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145142142181 - 2¹³ = 145142133989 is a prime.

It is a super-2 number, since 2×145142142181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145142140181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72571071090 + 72571071091.

It is an arithmetic number, because the mean of its divisors is an integer number (72571071091).

Almost surely, 2^145142142181 is an apocalyptic number.

It is an amenable number.

145142142181 is a deficient number, since it is larger than the sum of its proper divisors (1).

145142142181 is an equidigital number, since it uses as much as digits as its factorization.

145142142181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10240, while the sum is 34.

The spelling of 145142142181 in words is "one hundred forty-five billion, one hundred forty-two million, one hundred forty-two thousand, one hundred eighty-one".