6261783221 has 4 divisors (see below), whose sum is σ = 6367915200. Its totient is φ = 6155651244.

The previous prime is 6261783173. The next prime is 6261783233. The reversal of 6261783221 is 1223871626.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1223871626 = 2 ⋅611935813.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6261783221 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 (6261783251) 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, 53065901 + ... + 53066018.

It is an arithmetic number, because the mean of its divisors is an integer number (1591978800).

Almost surely, 2^6261783221 is an apocalyptic number.

It is an amenable number.

6261783221 is a deficient number, since it is larger than the sum of its proper divisors (106131979).

6261783221 is a wasteful number, since it uses less digits than its factorization.

6261783221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106131978.

The product of its digits is 48384, while the sum is 38.

The square root of 6261783221 is about 79131.4300452102. The cubic root of 6261783221 is about 1843.1726161334.

The spelling of 6261783221 in words is "six billion, two hundred sixty-one million, seven hundred eighty-three thousand, two hundred twenty-one".