620243511 has 16 divisors (see below), whose sum is σ = 840585984. Its totient is φ = 406750464.

The previous prime is 620243509. The next prime is 620243549. The reversal of 620243511 is 115342026.

620243511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 620243511 - 2¹ = 620243509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620243501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42216 + ... + 54978.

It is an arithmetic number, because the mean of its divisors is an integer number (52536624).

Almost surely, 2^620243511 is an apocalyptic number.

620243511 is a deficient number, since it is larger than the sum of its proper divisors (220342473).

620243511 is a wasteful number, since it uses less digits than its factorization.

620243511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13030.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 620243511 is about 24904.6885344908. The cubic root of 620243511 is about 852.8135193569.

Adding to 620243511 its reverse (115342026), we get a palindrome (735585537).

The spelling of 620243511 in words is "six hundred twenty million, two hundred forty-three thousand, five hundred eleven".