621006255 has 24 divisors (see below), whose sum is σ = 1091161968. Its totient is φ = 326664576.

The previous prime is 621006227. The next prime is 621006259. The reversal of 621006255 is 552600126.

It is not a de Polignac number, because 621006255 - 2²⁶ = 553897391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621006259) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91237 + ... + 97806.

It is an arithmetic number, because the mean of its divisors is an integer number (45465082).

Almost surely, 2^621006255 is an apocalyptic number.

621006255 is a deficient number, since it is larger than the sum of its proper divisors (470155713).

621006255 is a wasteful number, since it uses less digits than its factorization.

621006255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189127 (or 189124 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 621006255 is about 24919.9970906900. The cubic root of 621006255 is about 853.1629584206.

The spelling of 621006255 in words is "six hundred twenty-one million, six thousand, two hundred fifty-five".