71525131 has 2 divisors, whose sum is σ = 71525132. Its totient is φ = 71525130.

The previous prime is 71525119. The next prime is 71525141. The reversal of 71525131 is 13152517.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71525131 - 2¹¹ = 71523083 is a prime.

It is a super-2 number, since 2×71525131² = 10231688729134322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71525096 and 71525105.

It is not a weakly prime, because it can be changed into another prime (71525141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35762565 + 35762566.

It is an arithmetic number, because the mean of its divisors is an integer number (35762566).

Almost surely, 2^71525131 is an apocalyptic number.

71525131 is a deficient number, since it is larger than the sum of its proper divisors (1).

71525131 is an equidigital number, since it uses as much as digits as its factorization.

71525131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1050, while the sum is 25.

The square root of 71525131 is about 8457.2531592710. The cubic root of 71525131 is about 415.1001471183.

Adding to 71525131 its reverse (13152517), we get a palindrome (84677648).

The spelling of 71525131 in words is "seventy-one million, five hundred twenty-five thousand, one hundred thirty-one".