2102522157 has 8 divisors (see below), whose sum is σ = 3114847680. Its totient is φ = 1401681420.

The previous prime is 2102522153. The next prime is 2102522179. The reversal of 2102522157 is 7512252012.

It is not a de Polignac number, because 2102522157 - 2² = 2102522153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 77871191 = 2102522157 / (2 + 1 + 0 + 2 + 5 + 2 + 2 + 1 + 5 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 2102522157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102522153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38935569 + ... + 38935622.

It is an arithmetic number, because the mean of its divisors is an integer number (389355960).

Almost surely, 2^2102522157 is an apocalyptic number.

2102522157 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2102522157 is a deficient number, since it is larger than the sum of its proper divisors (1012325523).

2102522157 is an equidigital number, since it uses as much as digits as its factorization.

2102522157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77871200 (or 77871194 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 2102522157 is about 45853.2676807226. The cubic root of 2102522157 is about 1281.0916299927.

Adding to 2102522157 its reverse (7512252012), we get a palindrome (9614774169).

The spelling of 2102522157 in words is "two billion, one hundred two million, five hundred twenty-two thousand, one hundred fifty-seven".