7131215105 has 16 divisors (see below), whose sum is σ = 9851345280. Its totient is φ = 4854279552.

The previous prime is 7131215099. The next prime is 7131215123. The reversal of 7131215105 is 5015121317.

It is a cyclic number.

It is not a de Polignac number, because 7131215105 - 2⁶ = 7131215041 is a prime.

It is a super-2 number, since 2×7131215105² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 738815 + ... + 748404.

It is an arithmetic number, because the mean of its divisors is an integer number (615709080).

Almost surely, 2^7131215105 is an apocalyptic number.

It is an amenable number.

7131215105 is a deficient number, since it is larger than the sum of its proper divisors (2720130175).

7131215105 is a wasteful number, since it uses less digits than its factorization.

7131215105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487368.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 7131215105 is about 84446.5221604774. The cubic root of 7131215105 is about 1924.8099080297.

The spelling of 7131215105 in words is "seven billion, one hundred thirty-one million, two hundred fifteen thousand, one hundred five".