7212150665 has 8 divisors (see below), whose sum is σ = 8685826440. Its totient is φ = 5748890112.

The previous prime is 7212150643. The next prime is 7212150691. The reversal of 7212150665 is 5660512127.

It can be written as a sum of positive squares in 4 ways, for example, as 23145721 + 7189004944 = 4811^2 + 84788^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7212150665 - 2¹⁰ = 7212149641 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2602280 + ... + 2605049.

It is an arithmetic number, because the mean of its divisors is an integer number (1085728305).

Almost surely, 2^7212150665 is an apocalyptic number.

It is an amenable number.

7212150665 is a deficient number, since it is larger than the sum of its proper divisors (1473675775).

7212150665 is a wasteful number, since it uses less digits than its factorization.

7212150665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5207611.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 7212150665 is about 84924.3820407308. The cubic root of 7212150665 is about 1932.0643937497.

The spelling of 7212150665 in words is "seven billion, two hundred twelve million, one hundred fifty thousand, six hundred sixty-five".