152161561 has 2 divisors, whose sum is σ = 152161562. Its totient is φ = 152161560.

The previous prime is 152161517. The next prime is 152161589. The reversal of 152161561 is 165161251.

It is a happy number.

It is an a-pointer prime, because the next prime (152161589) can be obtained adding 152161561 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149817600 + 2343961 = 12240^2 + 1531^2 .

It is an emirp because it is prime and its reverse (165161251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 152161561 - 2⁷ = 152161433 is a prime.

It is not a weakly prime, because it can be changed into another prime (152161661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76080780 + 76080781.

It is an arithmetic number, because the mean of its divisors is an integer number (76080781).

Almost surely, 2^152161561 is an apocalyptic number.

It is an amenable number.

152161561 is a deficient number, since it is larger than the sum of its proper divisors (1).

152161561 is an equidigital number, since it uses as much as digits as its factorization.

152161561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 28.

The square root of 152161561 is about 12335.3784295416. The cubic root of 152161561 is about 533.8693459666.

The spelling of 152161561 in words is "one hundred fifty-two million, one hundred sixty-one thousand, five hundred sixty-one".