2112153140 has 24 divisors (see below), whose sum is σ = 4555402152. Its totient is φ = 822026880.

The previous prime is 2112153137. The next prime is 2112153149. The reversal of 2112153140 is 413512112.

It can be written as a sum of positive squares in 4 ways, for example, as 203861284 + 1908291856 = 14278^2 + 43684^2 .

It is a super-2 number, since 2×2112153140² = 8922381773623719200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112153149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1426391 + ... + 1427870.

It is an arithmetic number, because the mean of its divisors is an integer number (189808423).

Almost surely, 2^2112153140 is an apocalyptic number.

2112153140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112153140 is an abundant number, since it is smaller than the sum of its proper divisors (2443249012).

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

2112153140 is a wasteful number, since it uses less digits than its factorization.

2112153140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2854307 (or 2854305 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2112153140 is about 45958.1672828671. The cubic root of 2112153140 is about 1283.0447414640.

Adding to 2112153140 its reverse (413512112), we get a palindrome (2525665252).

The spelling of 2112153140 in words is "two billion, one hundred twelve million, one hundred fifty-three thousand, one hundred forty".