161334621 has 24 divisors (see below), whose sum is σ = 267300800. Its totient is φ = 91855296.

The previous prime is 161334619. The next prime is 161334623. The reversal of 161334621 is 126433161.

161334621 is a `hidden beast` number, since 1 + 6 + 1 + 3 + 34 + 621 = 666.

It is an interprime number because it is at equal distance from previous prime (161334619) and next prime (161334623).

It is not a de Polignac number, because 161334621 - 2¹ = 161334619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161334623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13305 + ... + 22353.

Almost surely, 2^161334621 is an apocalyptic number.

It is an amenable number.

161334621 is a deficient number, since it is larger than the sum of its proper divisors (105966179).

161334621 is a wasteful number, since it uses less digits than its factorization.

161334621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9345 (or 9342 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 161334621 is about 12701.7566107999. The cubic root of 161334621 is about 544.3888117974.

Adding to 161334621 its reverse (126433161), we get a palindrome (287767782).

The spelling of 161334621 in words is "one hundred sixty-one million, three hundred thirty-four thousand, six hundred twenty-one".