2102520664 has 8 divisors (see below), whose sum is σ = 3942226260. Its totient is φ = 1051260328.

The previous prime is 2102520661. The next prime is 2102520697. The reversal of 2102520664 is 4660252012.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102520661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131407534 + ... + 131407549.

Almost surely, 2^2102520664 is an apocalyptic number.

It is an amenable number.

2102520664 is a deficient number, since it is larger than the sum of its proper divisors (1839705596).

2102520664 is a wasteful number, since it uses less digits than its factorization.

2102520664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262815089 (or 262815085 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 2102520664 is about 45853.2514005277. The cubic root of 2102520664 is about 1281.0913267584.

Adding to 2102520664 its reverse (4660252012), we get a palindrome (6762772676).

The spelling of 2102520664 in words is "two billion, one hundred two million, five hundred twenty thousand, six hundred sixty-four".