161312256 has 160 divisors (see below), whose sum is σ = 546036480. Its totient is φ = 46061568.

The previous prime is 161312227. The next prime is 161312257. The reversal of 161312256 is 652213161.

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 (161312257) 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, 95935 + ... + 97601.

It is an arithmetic number, because the mean of its divisors is an integer number (3412728).

Almost surely, 2^161312256 is an apocalyptic number.

161312256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161312256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273018240).

161312256 is an abundant number, since it is smaller than the sum of its proper divisors (384724224).

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

161312256 is an equidigital number, since it uses as much as digits as its factorization.

161312256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701 (or 1679 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 161312256 is about 12700.8761902477. The cubic root of 161312256 is about 544.3636553486.

The spelling of 161312256 in words is "one hundred sixty-one million, three hundred twelve thousand, two hundred fifty-six".