2102580901 has 4 divisors (see below), whose sum is σ = 2153863404. Its totient is φ = 2051298400.

The previous prime is 2102580899. The next prime is 2102580913. The reversal of 2102580901 is 1090852012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 781258401 + 1321322500 = 27951^2 + 36350^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102580901 - 2¹ = 2102580899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2102580901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102580001) 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, 25641190 + ... + 25641271.

It is an arithmetic number, because the mean of its divisors is an integer number (538465851).

Almost surely, 2^2102580901 is an apocalyptic number.

It is an amenable number.

2102580901 is a deficient number, since it is larger than the sum of its proper divisors (51282503).

2102580901 is an equidigital number, since it uses as much as digits as its factorization.

2102580901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51282502.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 2102580901 is about 45853.9082412830. The cubic root of 2102580901 is about 1281.1035610197.

It can be divided in two parts, 21025 and 80901, that added together give a triangular number (101926 = T₄₅₁).

The spelling of 2102580901 in words is "two billion, one hundred two million, five hundred eighty thousand, nine hundred one".