622221566 has 4 divisors (see below), whose sum is σ = 933332352. Its totient is φ = 311110782.

The previous prime is 622221547. The next prime is 622221577. The reversal of 622221566 is 665122226.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 665122226 = 2 ⋅332561113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155555390 + ... + 155555393.

It is an arithmetic number, because the mean of its divisors is an integer number (233333088).

Almost surely, 2^622221566 is an apocalyptic number.

622221566 is a deficient number, since it is larger than the sum of its proper divisors (311110786).

622221566 is a wasteful number, since it uses less digits than its factorization.

622221566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311110785.

The product of its digits is 17280, while the sum is 32.

The square root of 622221566 is about 24944.3694247820. The cubic root of 622221566 is about 853.7191432019.

The spelling of 622221566 in words is "six hundred twenty-two million, two hundred twenty-one thousand, five hundred sixty-six".