2112154040 has 32 divisors (see below), whose sum is σ = 4795956000. Its totient is φ = 837108864.

The previous prime is 2112154027. The next prime is 2112154061. The reversal of 2112154040 is 404512112.

It is a happy number.

It is a super-2 number, since 2×2112154040² = 8922389377376643200, 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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237860 + ... + 246579.

It is an arithmetic number, because the mean of its divisors is an integer number (149873625).

Almost surely, 2^2112154040 is an apocalyptic number.

2112154040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112154040 is an abundant number, since it is smaller than the sum of its proper divisors (2683801960).

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

2112154040 is a wasteful number, since it uses less digits than its factorization.

2112154040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484559 (or 484555 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2112154040 is about 45958.1770743793. The cubic root of 2112154040 is about 1283.0449237014.

Adding to 2112154040 its reverse (404512112), we get a palindrome (2516666152).

The spelling of 2112154040 in words is "two billion, one hundred twelve million, one hundred fifty-four thousand, forty".