1612220443 has 4 divisors (see below), whose sum is σ = 1682317008. Its totient is φ = 1542123880.

The previous prime is 1612220437. The next prime is 1612220459. The reversal of 1612220443 is 3440222161.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1612220443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1612290443) 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, 35048248 + ... + 35048293.

It is an arithmetic number, because the mean of its divisors is an integer number (420579252).

Almost surely, 2^1612220443 is an apocalyptic number.

1612220443 is a deficient number, since it is larger than the sum of its proper divisors (70096565).

1612220443 is an equidigital number, since it uses as much as digits as its factorization.

1612220443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70096564.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1612220443 is about 40152.4649679195. The cubic root of 1612220443 is about 1172.5772788795.

The spelling of 1612220443 in words is "one billion, six hundred twelve million, two hundred twenty thousand, four hundred forty-three".