1632211561 has 4 divisors (see below), whose sum is σ = 1644125652. Its totient is φ = 1620297472.

The previous prime is 1632211541. The next prime is 1632211571. The reversal of 1632211561 is 1651122361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 565535961 + 1066675600 = 23781^2 + 32660^2 .

It is a cyclic number.

It is not a de Polignac number, because 1632211561 - 2¹⁹ = 1631687273 is a prime.

It is a super-2 number, since 2×1632211561² = 5328229159724113442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1632211541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5956840 + ... + 5957113.

It is an arithmetic number, because the mean of its divisors is an integer number (411031413).

Almost surely, 2^1632211561 is an apocalyptic number.

It is an amenable number.

1632211561 is a deficient number, since it is larger than the sum of its proper divisors (11914091).

1632211561 is a wasteful number, since it uses less digits than its factorization.

1632211561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11914090.

The product of its digits is 2160, while the sum is 28.

The square root of 1632211561 is about 40400.6381261485. The cubic root of 1632211561 is about 1177.4039357682.

The spelling of 1632211561 in words is "one billion, six hundred thirty-two million, two hundred eleven thousand, five hundred sixty-one".