7151531 has 2 divisors, whose sum is σ = 7151532. Its totient is φ = 7151530.

The previous prime is 7151503. The next prime is 7151533. The reversal of 7151531 is 1351517.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7151531 is a prime.

It is a super-2 number, since 2×7151531² = 102288791287922, which contains 22 as substring.

Together with 7151533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7151497 and 7151506.

It is not a weakly prime, because it can be changed into another prime (7151533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3575765 + 3575766.

It is an arithmetic number, because the mean of its divisors is an integer number (3575766).

Almost surely, 2^7151531 is an apocalyptic number.

7151531 is a deficient number, since it is larger than the sum of its proper divisors (1).

7151531 is an equidigital number, since it uses as much as digits as its factorization.

7151531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 525, while the sum is 23.

The square root of 7151531 is about 2674.2346568691. The cubic root of 7151531 is about 192.6636018531.

The spelling of 7151531 in words is "seven million, one hundred fifty-one thousand, five hundred thirty-one".