161030621 has 2 divisors, whose sum is σ = 161030622. Its totient is φ = 161030620.

The previous prime is 161030609. The next prime is 161030633. The reversal of 161030621 is 126030161.

161030621 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 (161030609) and next prime (161030633).

It can be written as a sum of positive squares in only one way, i.e., 91891396 + 69139225 = 9586^2 + 8315^2 .

It is a cyclic number.

It is not a de Polignac number, because 161030621 - 2⁶ = 161030557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161030593 and 161030602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161030021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80515310 + 80515311.

It is an arithmetic number, because the mean of its divisors is an integer number (80515311).

Almost surely, 2^161030621 is an apocalyptic number.

It is an amenable number.

161030621 is a deficient number, since it is larger than the sum of its proper divisors (1).

161030621 is an equidigital number, since it uses as much as digits as its factorization.

161030621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 161030621 is about 12689.7841195191. The cubic root of 161030621 is about 544.0466693760.

Adding to 161030621 its reverse (126030161), we get a palindrome (287060782).

The spelling of 161030621 in words is "one hundred sixty-one million, thirty thousand, six hundred twenty-one".