6868211522 has 4 divisors (see below), whose sum is σ = 10302317286. Its totient is φ = 3434105760.

The previous prime is 6868211489. The next prime is 6868211533. The reversal of 6868211522 is 2251128686.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2251128686 = 2 ⋅1125564343.

It can be written as a sum of positive squares in only one way, i.e., 5754587881 + 1113623641 = 75859^2 + 33371^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6868211522.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1717052879 + ... + 1717052882.

Almost surely, 2^6868211522 is an apocalyptic number.

6868211522 is a deficient number, since it is larger than the sum of its proper divisors (3434105764).

6868211522 is a wasteful number, since it uses less digits than its factorization.

6868211522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3434105763.

The product of its digits is 92160, while the sum is 41.

The square root of 6868211522 is about 82874.6735860842. The cubic root of 6868211522 is about 1900.8501755710.

The spelling of 6868211522 in words is "six billion, eight hundred sixty-eight million, two hundred eleven thousand, five hundred twenty-two".