611220563 has 4 divisors (see below), whose sum is σ = 611276208. Its totient is φ = 611164920.

The previous prime is 611220541. The next prime is 611220581. The reversal of 611220563 is 365022116.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 611220563 - 2⁸ = 611220307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611240563) 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, 5231 + ... + 35352.

It is an arithmetic number, because the mean of its divisors is an integer number (152819052).

Almost surely, 2^611220563 is an apocalyptic number.

611220563 is a deficient number, since it is larger than the sum of its proper divisors (55645).

611220563 is a wasteful number, since it uses less digits than its factorization.

611220563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55644.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 611220563 is about 24722.8752979907. The cubic root of 611220563 is about 848.6578879781.

Adding to 611220563 its reverse (365022116), we get a palindrome (976242679).

The spelling of 611220563 in words is "six hundred eleven million, two hundred twenty thousand, five hundred sixty-three".