1620055213 has 8 divisors (see below), whose sum is σ = 1862195328. Its totient is φ = 1380591024.

The previous prime is 1620055169. The next prime is 1620055237. The reversal of 1620055213 is 3125500261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1620055213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620056213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 667681 + ... + 670102.

It is an arithmetic number, because the mean of its divisors is an integer number (232774416).

Almost surely, 2^1620055213 is an apocalyptic number.

It is an amenable number.

1620055213 is a deficient number, since it is larger than the sum of its proper divisors (242140115).

1620055213 is a wasteful number, since it uses less digits than its factorization.

1620055213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337963.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1620055213 is about 40249.9094781591. The cubic root of 1620055213 is about 1174.4736348896.

Adding to 1620055213 its reverse (3125500261), we get a palindrome (4745555474).

The spelling of 1620055213 in words is "one billion, six hundred twenty million, fifty-five thousand, two hundred thirteen".