82531511 has 2 divisors, whose sum is σ = 82531512. Its totient is φ = 82531510.

The previous prime is 82531507. The next prime is 82531513. The reversal of 82531511 is 11513528.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82531511 - 2² = 82531507 is a prime.

It is a super-2 number, since 2×82531511² = 13622900615886242, which contains 22 as substring.

Together with 82531513, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_4808501 and since 82531511 and 4808501 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82531513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41265755 + 41265756.

It is an arithmetic number, because the mean of its divisors is an integer number (41265756).

Almost surely, 2^82531511 is an apocalyptic number.

82531511 is a deficient number, since it is larger than the sum of its proper divisors (1).

82531511 is an equidigital number, since it uses as much as digits as its factorization.

82531511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 26.

The square root of 82531511 is about 9084.6855201487. The cubic root of 82531511 is about 435.3848024096.

The spelling of 82531511 in words is "eighty-two million, five hundred thirty-one thousand, five hundred eleven".