7151746842221 has 2 divisors, whose sum is σ = 7151746842222. Its totient is φ = 7151746842220.

The previous prime is 7151746842199. The next prime is 7151746842269. The reversal of 7151746842221 is 1222486471517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7148596826596 + 3150015625 = 2673686^2 + 56125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7151746842221 is a prime.

It is a super-2 number, since 2×7151746842221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7151746842221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7151746841221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3575873421110 + 3575873421111.

It is an arithmetic number, because the mean of its divisors is an integer number (3575873421111).

Almost surely, 2^{7151746842221} is an apocalyptic number.

It is an amenable number.

7151746842221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7151746842221 is an equidigital number, since it uses as much as digits as its factorization.

7151746842221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1505280, while the sum is 50.

The spelling of 7151746842221 in words is "seven trillion, one hundred fifty-one billion, seven hundred forty-six million, eight hundred forty-two thousand, two hundred twenty-one".