6212261621 has 4 divisors (see below), whose sum is σ = 6212797152. Its totient is φ = 6211726092.

The previous prime is 6212261597. The next prime is 6212261663. The reversal of 6212261621 is 1261622126.

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 6212261621 - 2¹⁰ = 6212260597 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 (6212261021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249971 + ... + 273696.

It is an arithmetic number, because the mean of its divisors is an integer number (1553199288).

Almost surely, 2^6212261621 is an apocalyptic number.

It is an amenable number.

6212261621 is a deficient number, since it is larger than the sum of its proper divisors (535531).

6212261621 is a wasteful number, since it uses less digits than its factorization.

6212261621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535530.

The product of its digits is 3456, while the sum is 29.

The square root of 6212261621 is about 78817.9016531143. The cubic root of 6212261621 is about 1838.3008121006.

Adding to 6212261621 its reverse (1261622126), we get a palindrome (7473883747).

The spelling of 6212261621 in words is "six billion, two hundred twelve million, two hundred sixty-one thousand, six hundred twenty-one".