1422211561 has 4 divisors (see below), whose sum is σ = 1422332800. Its totient is φ = 1422090324.

The previous prime is 1422211499. The next prime is 1422211621. The reversal of 1422211561 is 1651122241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1651122241 = 2131 ⋅774811.

It is a cyclic number.

It is not a de Polignac number, because 1422211561 - 2⁷ = 1422211433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1422211361) 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, 40881 + ... + 67198.

It is an arithmetic number, because the mean of its divisors is an integer number (355583200).

Almost surely, 2^1422211561 is an apocalyptic number.

It is an amenable number.

1422211561 is a deficient number, since it is larger than the sum of its proper divisors (121239).

1422211561 is a wasteful number, since it uses less digits than its factorization.

1422211561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121238.

The product of its digits is 960, while the sum is 25.

The square root of 1422211561 is about 37712.2203138452. The cubic root of 1422211561 is about 1124.5740770548.

The spelling of 1422211561 in words is "one billion, four hundred twenty-two million, two hundred eleven thousand, five hundred sixty-one".