2522616021 has 32 divisors (see below), whose sum is σ = 3806304000. Its totient is φ = 1650767040.

The previous prime is 2522616017. The next prime is 2522616029. The reversal of 2522616021 is 1206162252.

2522616021 is a `hidden beast` number, since 2 + 5 + 22 + 616 + 0 + 21 = 666.

It is not a de Polignac number, because 2522616021 - 2² = 2522616017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2522616029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 985275 + ... + 987831.

It is an arithmetic number, because the mean of its divisors is an integer number (118947000).

Almost surely, 2^2522616021 is an apocalyptic number.

It is an amenable number.

2522616021 is a deficient number, since it is larger than the sum of its proper divisors (1283687979).

2522616021 is a wasteful number, since it uses less digits than its factorization.

2522616021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3226 (or 3220 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 2522616021 is about 50225.6510261440. The cubic root of 2522616021 is about 1361.2891504954.

Adding to 2522616021 its reverse (1206162252), we get a palindrome (3728778273).

The spelling of 2522616021 in words is "two billion, five hundred twenty-two million, six hundred sixteen thousand, twenty-one".