1231163160 has 128 divisors (see below), whose sum is σ = 3820824000. Its totient is φ = 317122560.

The previous prime is 1231163149. The next prime is 1231163161. The reversal of 1231163160 is 613611321.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1231163160.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231163161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 660630 + ... + 662490.

Almost surely, 2^1231163160 is an apocalyptic number.

1231163160 is a gapful number since it is divisible by the number (10) 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 1231163160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1910412000).

1231163160 is an abundant number, since it is smaller than the sum of its proper divisors (2589660840).

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

1231163160 is a wasteful number, since it uses less digits than its factorization.

1231163160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061 (or 2057 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1231163160 is about 35087.9346784618. The cubic root of 1231163160 is about 1071.7789024791.

Adding to 1231163160 its reverse (613611321), we get a palindrome (1844774481).

The spelling of 1231163160 in words is "one billion, two hundred thirty-one million, one hundred sixty-three thousand, one hundred sixty".