161440335 has 48 divisors (see below), whose sum is σ = 333725184. Its totient is φ = 70589376.

The previous prime is 161440333. The next prime is 161440369. The reversal of 161440335 is 533044161.

161440335 is a `hidden beast` number, since 1 + 614 + 40 + 3 + 3 + 5 = 666.

It is not a de Polignac number, because 161440335 - 2¹ = 161440333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161440299 and 161440308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161440333) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3897 + ... + 18386.

It is an arithmetic number, because the mean of its divisors is an integer number (6952608).

Almost surely, 2^161440335 is an apocalyptic number.

161440335 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161440335 is an abundant number, since it is smaller than the sum of its proper divisors (172284849).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161440335 is a wasteful number, since it uses less digits than its factorization.

161440335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22324 (or 22321 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 161440335 is about 12705.9173222558. The cubic root of 161440335 is about 544.5076888522.

Adding to 161440335 its reverse (533044161), we get a palindrome (694484496).

The spelling of 161440335 in words is "one hundred sixty-one million, four hundred forty thousand, three hundred thirty-five".