621056243 has 8 divisors (see below), whose sum is σ = 635467200. Its totient is φ = 606774888.

The previous prime is 621056239. The next prime is 621056251. The reversal of 621056243 is 342650126.

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

It is a cyclic number.

It is not a de Polignac number, because 621056243 - 2² = 621056239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621056213) 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, 22673 + ... + 41906.

It is an arithmetic number, because the mean of its divisors is an integer number (79433400).

Almost surely, 2^621056243 is an apocalyptic number.

621056243 is a deficient number, since it is larger than the sum of its proper divisors (14410957).

621056243 is a wasteful number, since it uses less digits than its factorization.

621056243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64801.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 621056243 is about 24921.0000401268. Note that the first 4 decimals coincide. The cubic root of 621056243 is about 853.1858496370.

The spelling of 621056243 in words is "six hundred twenty-one million, fifty-six thousand, two hundred forty-three".