7151331521 has 2 divisors, whose sum is σ = 7151331522. Its totient is φ = 7151331520.

The previous prime is 7151331487. The next prime is 7151331529. The reversal of 7151331521 is 1251331517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7147857025 + 3474496 = 84545^2 + 1864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7151331521 is a prime.

It is a super-2 number, since 2×7151331521² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7151331529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3575665760 + 3575665761.

It is an arithmetic number, because the mean of its divisors is an integer number (3575665761).

Almost surely, 2^7151331521 is an apocalyptic number.

It is an amenable number.

7151331521 is a deficient number, since it is larger than the sum of its proper divisors (1).

7151331521 is an equidigital number, since it uses as much as digits as its factorization.

7151331521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 29.

The square root of 7151331521 is about 84565.5457086395. The cubic root of 7151331521 is about 1926.6181050241.

The spelling of 7151331521 in words is "seven billion, one hundred fifty-one million, three hundred thirty-one thousand, five hundred twenty-one".