2155105000 has 40 divisors (see below), whose sum is σ = 5049422730. Its totient is φ = 862040000.

The previous prime is 2155104983. The next prime is 2155105013. The reversal of 2155105000 is 5015512.

It can be written as a sum of positive squares in 5 ways, for example, as 4186116 + 2150918884 = 2046^2 + 46378^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×2155105000² = 9288955122050000000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 210511 + ... + 220510.

Almost surely, 2^2155105000 is an apocalyptic number.

2155105000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155105000 is an abundant number, since it is smaller than the sum of its proper divisors (2894317730).

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

2155105000 is an equidigital number, since it uses as much as digits as its factorization.

2155105000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431047 (or 431028 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 2155105000 is about 46423.1084698127. The cubic root of 2155105000 is about 1291.6835978819.

The spelling of 2155105000 in words is "two billion, one hundred fifty-five million, one hundred five thousand".