161340255 has 40 divisors (see below), whose sum is σ = 291520944. Its totient is φ = 85363200.

The previous prime is 161340241. The next prime is 161340259. The reversal of 161340255 is 552043161.

161340255 is a `hidden beast` number, since 1 + 613 + 40 + 2 + 5 + 5 = 666.

It is not a de Polignac number, because 161340255 - 2²³ = 152951647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161340259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 51535 + ... + 54575.

Almost surely, 2^161340255 is an apocalyptic number.

161340255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161340255 is a deficient number, since it is larger than the sum of its proper divisors (130180689).

161340255 is a wasteful number, since it uses less digits than its factorization.

161340255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189 (or 3180 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 161340255 is about 12701.9783892117. The cubic root of 161340255 is about 544.3951486288.

The spelling of 161340255 in words is "one hundred sixty-one million, three hundred forty thousand, two hundred fifty-five".