2105540154 has 12 divisors (see below), whose sum is σ = 4562003706. Its totient is φ = 701846712.

The previous prime is 2105540147. The next prime is 2105540179. The reversal of 2105540154 is 4510455012.

2105540154 is a `hidden beast` number, since 2 + 105 + 540 + 15 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2105433225 + 106929 = 45885^2 + 327^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58487209 + ... + 58487244.

Almost surely, 2^2105540154 is an apocalyptic number.

2105540154 is an abundant number, since it is smaller than the sum of its proper divisors (2456463552).

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

2105540154 is a wasteful number, since it uses less digits than its factorization.

2105540154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116974461 (or 116974458 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 2105540154 is about 45886.1651699071. The cubic root of 2105540154 is about 1281.7043040334.

Adding to 2105540154 its reverse (4510455012), we get a palindrome (6615995166).

The spelling of 2105540154 in words is "two billion, one hundred five million, five hundred forty thousand, one hundred fifty-four".