145611181 has 2 divisors, whose sum is σ = 145611182. Its totient is φ = 145611180.

The previous prime is 145611173. The next prime is 145611197. The reversal of 145611181 is 181116541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128255625 + 17355556 = 11325^2 + 4166^2 .

It is a cyclic number.

It is not a de Polignac number, because 145611181 - 2³ = 145611173 is a prime.

It is a super-2 number, since 2×145611181² = 42405232064429522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145611121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72805590 + 72805591.

It is an arithmetic number, because the mean of its divisors is an integer number (72805591).

Almost surely, 2^145611181 is an apocalyptic number.

It is an amenable number.

145611181 is a deficient number, since it is larger than the sum of its proper divisors (1).

145611181 is an equidigital number, since it uses as much as digits as its factorization.

145611181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 28.

The square root of 145611181 is about 12066.9458024804. The cubic root of 145611181 is about 526.0958889217.

The spelling of 145611181 in words is "one hundred forty-five million, six hundred eleven thousand, one hundred eighty-one".