2131161960 has 256 divisors, whose sum is σ = 6880204800. Its totient is φ = 527155200.

The previous prime is 2131161953. The next prime is 2131161997. The reversal of 2131161960 is 691611312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13574202 + ... + 13574358.

It is an arithmetic number, because the mean of its divisors is an integer number (26875800).

Almost surely, 2^2131161960 is an apocalyptic number.

2131161960 is a gapful number since it is divisible by the number (20) 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 2131161960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3440102400).

2131161960 is an abundant number, since it is smaller than the sum of its proper divisors (4749042840).

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

2131161960 is a wasteful number, since it uses less digits than its factorization.

2131161960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 2131161960 is about 46164.5097450412. The cubic root of 2131161960 is about 1286.8822733118.

The spelling of 2131161960 in words is "two billion, one hundred thirty-one million, one hundred sixty-one thousand, nine hundred sixty".