2102105157 has 4 divisors (see below), whose sum is σ = 2802806880. Its totient is φ = 1401403436.

The previous prime is 2102105129. The next prime is 2102105167. The reversal of 2102105157 is 7515012012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2102105157 - 2²⁸ = 1833669701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102105167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350350857 + ... + 350350862.

It is an arithmetic number, because the mean of its divisors is an integer number (700701720).

Almost surely, 2^2102105157 is an apocalyptic number.

It is an amenable number.

2102105157 is a deficient number, since it is larger than the sum of its proper divisors (700701723).

2102105157 is an equidigital number, since it uses as much as digits as its factorization.

2102105157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700701722.

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 2102105157 is about 45848.7203420117. The cubic root of 2102105157 is about 1281.0069300480.

Adding to 2102105157 its reverse (7515012012), we get a palindrome (9617117169).

The spelling of 2102105157 in words is "two billion, one hundred two million, one hundred five thousand, one hundred fifty-seven".