7218651011 has 16 divisors (see below), whose sum is σ = 8600110848. Its totient is φ = 5972282400.

The previous prime is 7218651007. The next prime is 7218651031. The reversal of 7218651011 is 1101568127.

7218651011 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 7218651011 - 2² = 7218651007 is a prime.

It is a super-2 number, since 2×7218651011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7218651031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345341 + ... + 365646.

It is an arithmetic number, because the mean of its divisors is an integer number (537506928).

Almost surely, 2^7218651011 is an apocalyptic number.

7218651011 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

7218651011 is a deficient number, since it is larger than the sum of its proper divisors (1381459837).

7218651011 is a wasteful number, since it uses less digits than its factorization.

7218651011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711082.

The product of its (nonzero) digits is 3360, while the sum is 32.

The square root of 7218651011 is about 84962.6447975815. The cubic root of 7218651011 is about 1932.6446790828.

The spelling of 7218651011 in words is "seven billion, two hundred eighteen million, six hundred fifty-one thousand, eleven".