2102155924 has 24 divisors (see below), whose sum is σ = 4014567648. Its totient is φ = 955201440.

The previous prime is 2102155897. The next prime is 2102155933. The reversal of 2102155924 is 4295512012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164427 + ... + 176749.

It is an arithmetic number, because the mean of its divisors is an integer number (167273652).

Almost surely, 2^2102155924 is an apocalyptic number.

It is an amenable number.

2102155924 is a deficient number, since it is larger than the sum of its proper divisors (1912411724).

2102155924 is a wasteful number, since it uses less digits than its factorization.

2102155924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16215 (or 16213 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 2102155924 is about 45849.2739746225. The cubic root of 2102155924 is about 1281.0172423065.

Adding to 2102155924 its reverse (4295512012), we get a palindrome (6397667936).

The spelling of 2102155924 in words is "two billion, one hundred two million, one hundred fifty-five thousand, nine hundred twenty-four".