651216506 has 16 divisors (see below), whose sum is σ = 989604000. Its totient is φ = 321356688.

The previous prime is 651216497. The next prime is 651216509. The reversal of 651216506 is 605612156.

651216506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (651216509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280880 + ... + 283188.

It is an arithmetic number, because the mean of its divisors is an integer number (61850250).

Almost surely, 2^651216506 is an apocalyptic number.

651216506 is a deficient number, since it is larger than the sum of its proper divisors (338387494).

651216506 is a wasteful number, since it uses less digits than its factorization.

651216506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4093.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 651216506 is about 25518.9440612264. The cubic root of 651216506 is about 866.7791711608.

The spelling of 651216506 in words is "six hundred fifty-one million, two hundred sixteen thousand, five hundred six".