2102015557 has 2 divisors, whose sum is σ = 2102015558. Its totient is φ = 2102015556.

The previous prime is 2102015551. The next prime is 2102015561. The reversal of 2102015557 is 7555102012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1389872961 + 712142596 = 37281^2 + 26686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102015557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102015551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051007778 + 1051007779.

It is an arithmetic number, because the mean of its divisors is an integer number (1051007779).

Almost surely, 2^2102015557 is an apocalyptic number.

It is an amenable number.

2102015557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102015557 is an equidigital number, since it uses as much as digits as its factorization.

2102015557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3500, while the sum is 28.

The square root of 2102015557 is about 45847.7432050913. The cubic root of 2102015557 is about 1280.9887292694.

Adding to 2102015557 its reverse (7555102012), we get a palindrome (9657117569).

The spelling of 2102015557 in words is "two billion, one hundred two million, fifteen thousand, five hundred fifty-seven".