2620552021 has 4 divisors (see below), whose sum is σ = 2620683072. Its totient is φ = 2620420972.

The previous prime is 2620552013. The next prime is 2620552031. The reversal of 2620552021 is 1202550262.

It is a happy number.

2620552021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2620552021 - 2³ = 2620552013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2620552031) 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, 28591 + ... + 77836.

It is an arithmetic number, because the mean of its divisors is an integer number (655170768).

Almost surely, 2^2620552021 is an apocalyptic number.

It is an amenable number.

2620552021 is a deficient number, since it is larger than the sum of its proper divisors (131051).

2620552021 is a wasteful number, since it uses less digits than its factorization.

2620552021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131050.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2620552021 is about 51191.3275955996. The cubic root of 2620552021 is about 1378.6824961505.

The spelling of 2620552021 in words is "two billion, six hundred twenty million, five hundred fifty-two thousand, twenty-one".