2171201136 has 120 divisors (see below), whose sum is σ = 6393697920. Its totient is φ = 632855808.

The previous prime is 2171201119. The next prime is 2171201147. The reversal of 2171201136 is 6311021712.

It is a super-2 number, since 2×2171201136² = 9428228745935380992, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147085 + ... + 161171.

It is an arithmetic number, because the mean of its divisors is an integer number (53280816).

Almost surely, 2^2171201136 is an apocalyptic number.

2171201136 is a gapful number since it is divisible by the number (26) 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 2171201136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3196848960).

2171201136 is an abundant number, since it is smaller than the sum of its proper divisors (4222496784).

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

2171201136 is a wasteful number, since it uses less digits than its factorization.

2171201136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14143 (or 14124 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 2171201136 is about 46596.1493688051. The cubic root of 2171201136 is about 1294.8914178773.

Adding to 2171201136 its reverse (6311021712), we get a palindrome (8482222848).

The spelling of 2171201136 in words is "two billion, one hundred seventy-one million, two hundred one thousand, one hundred thirty-six".