2521620017 has 18 divisors (see below), whose sum is σ = 3095845218. Its totient is φ = 2047616928.

The previous prime is 2521619993. The next prime is 2521620037. The reversal of 2521620017 is 7100261252.

2521620017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1903053376 + 618566641 = 43624^2 + 24871^2 .

It is not a de Polignac number, because 2521620017 - 2⁶ = 2521619953 is a prime.

It is a super-3 number, since 3×2521620017³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2521620037) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 53588 + ... + 88965.

It is an arithmetic number, because the mean of its divisors is an integer number (171991401).

Almost surely, 2^2521620017 is an apocalyptic number.

It is an amenable number.

2521620017 is a deficient number, since it is larger than the sum of its proper divisors (574225201).

2521620017 is a wasteful number, since it uses less digits than its factorization.

2521620017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142605 (or 142579 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 2521620017 is about 50215.7347551542. The cubic root of 2521620017 is about 1361.1099677330.

Adding to 2521620017 its reverse (7100261252), we get a palindrome (9621881269).

The spelling of 2521620017 in words is "two billion, five hundred twenty-one million, six hundred twenty thousand, seventeen".