161081527 has 2 divisors, whose sum is σ = 161081528. Its totient is φ = 161081526.

The previous prime is 161081519. The next prime is 161081533. The reversal of 161081527 is 725180161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161081527 - 2³ = 161081519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161081507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80540763 + 80540764.

It is an arithmetic number, because the mean of its divisors is an integer number (80540764).

Almost surely, 2^161081527 is an apocalyptic number.

161081527 is a deficient number, since it is larger than the sum of its proper divisors (1).

161081527 is an equidigital number, since it uses as much as digits as its factorization.

161081527 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 161081527 is about 12691.7897477070. The cubic root of 161081527 is about 544.1039924733.

The spelling of 161081527 in words is "one hundred sixty-one million, eighty-one thousand, five hundred twenty-seven".