2111454540 has 240 divisors, whose sum is σ = 7207576992. Its totient is φ = 514335744.

The previous prime is 2111454539. The next prime is 2111454559. The reversal of 2111454540 is 454541112.

2111454540 is a `hidden beast` number, since 2 + 1 + 114 + 5 + 4 + 540 = 666.

It is a super-2 number, since 2×2111454540² = 8916480548973223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 79 ways as a sum of consecutive naturals, for example, 2252952 + ... + 2253888.

Almost surely, 2^2111454540 is an apocalyptic number.

2111454540 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 2111454540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3603788496).

2111454540 is an abundant number, since it is smaller than the sum of its proper divisors (5096122452).

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

2111454540 is a wasteful number, since it uses less digits than its factorization.

2111454540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 2111454540 is about 45950.5662641931. The cubic root of 2111454540 is about 1282.9032690995.

Adding to 2111454540 its reverse (454541112), we get a palindrome (2565995652).

The spelling of 2111454540 in words is "two billion, one hundred eleven million, four hundred fifty-four thousand, five hundred forty".