161357443 has 16 divisors (see below), whose sum is σ = 190874880. Its totient is φ = 134966304.

The previous prime is 161357411. The next prime is 161357459. The reversal of 161357443 is 344753161.

161357443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 161357443 - 2⁵ = 161357411 is a prime.

It is a super-2 number, since 2×161357443² = 52072448822996498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161357399 and 161357408.

It is not an unprimeable number, because it can be changed into a prime (161357243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8521 + ... + 19882.

It is an arithmetic number, because the mean of its divisors is an integer number (11929680).

Almost surely, 2^161357443 is an apocalyptic number.

161357443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161357443 is a deficient number, since it is larger than the sum of its proper divisors (29517437).

161357443 is a wasteful number, since it uses less digits than its factorization.

161357443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28458.

The product of its digits is 30240, while the sum is 34.

The square root of 161357443 is about 12702.6549587084. The cubic root of 161357443 is about 544.4144798894.

It can be divided in two parts, 161 and 357443, that added together give a square (357604 = 598²).

The spelling of 161357443 in words is "one hundred sixty-one million, three hundred fifty-seven thousand, four hundred forty-three".