161288551 has 2 divisors, whose sum is σ = 161288552. Its totient is φ = 161288550.

The previous prime is 161288539. The next prime is 161288563. The reversal of 161288551 is 155882161.

161288551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (161288539) and next prime (161288563).

It is a cyclic number.

It is not a de Polignac number, because 161288551 - 2⁷ = 161288423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161288551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161288531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80644275 + 80644276.

It is an arithmetic number, because the mean of its divisors is an integer number (80644276).

Almost surely, 2^161288551 is an apocalyptic number.

161288551 is a deficient number, since it is larger than the sum of its proper divisors (1).

161288551 is an equidigital number, since it uses as much as digits as its factorization.

161288551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 37.

The square root of 161288551 is about 12699.9429526278. The cubic root of 161288551 is about 544.3369891115.

The spelling of 161288551 in words is "one hundred sixty-one million, two hundred eighty-eight thousand, five hundred fifty-one".