1620032225 has 24 divisors (see below), whose sum is σ = 2299311168. Its totient is φ = 1109188800.

The previous prime is 1620032203. The next prime is 1620032269. The reversal of 1620032225 is 5222300261.

It is a de Polignac number, because none of the positive numbers 2^k-1620032225 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1620032225.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114227 + ... + 127623.

It is an arithmetic number, because the mean of its divisors is an integer number (95804632).

Almost surely, 2^1620032225 is an apocalyptic number.

It is an amenable number.

1620032225 is a deficient number, since it is larger than the sum of its proper divisors (679278943).

1620032225 is a wasteful number, since it uses less digits than its factorization.

1620032225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14105 (or 14100 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1620032225 is about 40249.6239112864. The cubic root of 1620032225 is about 1174.4680797441.

Adding to 1620032225 its reverse (5222300261), we get a palindrome (6842332486).

The spelling of 1620032225 in words is "one billion, six hundred twenty million, thirty-two thousand, two hundred twenty-five".