7216556111 has 2 divisors, whose sum is σ = 7216556112. Its totient is φ = 7216556110.

The previous prime is 7216556071. The next prime is 7216556119. The reversal of 7216556111 is 1116556127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7216556111 - 2¹⁴ = 7216539727 is a prime.

It is a super-2 number, since 2×7216556111² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7216556119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3608278055 + 3608278056.

It is an arithmetic number, because the mean of its divisors is an integer number (3608278056).

Almost surely, 2^7216556111 is an apocalyptic number.

7216556111 is a deficient number, since it is larger than the sum of its proper divisors (1).

7216556111 is an equidigital number, since it uses as much as digits as its factorization.

7216556111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 35.

The square root of 7216556111 is about 84950.3155438519. The cubic root of 7216556111 is about 1932.4577055957.

The spelling of 7216556111 in words is "seven billion, two hundred sixteen million, five hundred fifty-six thousand, one hundred eleven".