621226617 has 8 divisors (see below), whose sum is σ = 903602400. Its totient is φ = 376500960.

The previous prime is 621226607. The next prime is 621226667. The reversal of 621226617 is 716622126.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 621226617 - 2⁶ = 621226553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 18825049 = 621226617 / (6 + 2 + 1 + 2 + 2 + 6 + 6 + 1 + 7).

It is not an unprimeable number, because it can be changed into a prime (621226607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9412492 + ... + 9412557.

It is an arithmetic number, because the mean of its divisors is an integer number (112950300).

Almost surely, 2^621226617 is an apocalyptic number.

It is an amenable number.

621226617 is a deficient number, since it is larger than the sum of its proper divisors (282375783).

621226617 is a wasteful number, since it uses less digits than its factorization.

621226617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18825063.

The product of its digits is 12096, while the sum is 33.

The square root of 621226617 is about 24924.4180874900. The cubic root of 621226617 is about 853.2638604974.

The spelling of 621226617 in words is "six hundred twenty-one million, two hundred twenty-six thousand, six hundred seventeen".