3161272320 has 208 divisors, whose sum is σ = 11240673120. Its totient is φ = 842858496.

The previous prime is 3161272313. The next prime is 3161272321. The reversal of 3161272320 is 232721613.

3161272320 is a `hidden beast` number, since 3 + 1 + 612 + 7 + 23 + 20 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (3161272321) 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, 550102 + ... + 555818.

Almost surely, 2^3161272320 is an apocalyptic number.

3161272320 is a gapful number since it is divisible by the number (30) 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 3161272320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5620336560).

3161272320 is an abundant number, since it is smaller than the sum of its proper divisors (8079400800).

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

3161272320 is an equidigital number, since it uses as much as digits as its factorization.

3161272320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5755 (or 5727 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 3161272320 is about 56225.1929298602. The cubic root of 3161272320 is about 1467.6437052790.

Adding to 3161272320 its reverse (232721613), we get a palindrome (3393993933).

The spelling of 3161272320 in words is "three billion, one hundred sixty-one million, two hundred seventy-two thousand, three hundred twenty".