2155849101 has 56 divisors (see below), whose sum is σ = 3911505984. Its totient is φ = 1159401600.

The previous prime is 2155849061. The next prime is 2155849103. The reversal of 2155849101 is 1019485512.

2155849101 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2155849101 - 2⁶ = 2155849037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155849103) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 74326 + ... + 99176.

Almost surely, 2^2155849101 is an apocalyptic number.

2155849101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2155849101 is a deficient number, since it is larger than the sum of its proper divisors (1755656883).

2155849101 is an equidigital number, since it uses as much as digits as its factorization.

2155849101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24893 (or 24878 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 2155849101 is about 46431.1221165287. The cubic root of 2155849101 is about 1291.8322422185.

The spelling of 2155849101 in words is "two billion, one hundred fifty-five million, eight hundred forty-nine thousand, one hundred one".