2155104999 has 12 divisors (see below), whose sum is σ = 3113627400. Its totient is φ = 1436414544.

The previous prime is 2155104983. The next prime is 2155105013. The reversal of 2155104999 is 9994015512.

2155104999 is a `hidden beast` number, since 2 + 1 + 5 + 510 + 49 + 99 = 666.

It is not a de Polignac number, because 2155104999 - 2⁴ = 2155104983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155104979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19792 + ... + 68570.

It is an arithmetic number, because the mean of its divisors is an integer number (259468950).

Almost surely, 2^2155104999 is an apocalyptic number.

2155104999 is a deficient number, since it is larger than the sum of its proper divisors (958522401).

2155104999 is a wasteful number, since it uses less digits than its factorization.

2155104999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53694 (or 53691 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 45.

The square root of 2155104999 is about 46423.1084590422. The cubic root of 2155104999 is about 1291.6835976821.

The spelling of 2155104999 in words is "two billion, one hundred fifty-five million, one hundred four thousand, nine hundred ninety-nine".