7212011806 has 8 divisors (see below), whose sum is σ = 11110396680. Its totient is φ = 3508546248.

The previous prime is 7212011797. The next prime is 7212011837. The reversal of 7212011806 is 6081102127.

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

It is a super-2 number, since 2×7212011806² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 48729736 + ... + 48729883.

It is an arithmetic number, because the mean of its divisors is an integer number (1388799585).

Almost surely, 2^7212011806 is an apocalyptic number.

7212011806 is a deficient number, since it is larger than the sum of its proper divisors (3898384874).

7212011806 is a wasteful number, since it uses less digits than its factorization.

7212011806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97459658.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 7212011806 is about 84923.5644918417. The cubic root of 7212011806 is about 1932.0519940156.

The spelling of 7212011806 in words is "seven billion, two hundred twelve million, eleven thousand, eight hundred six".