82765531 has 2 divisors, whose sum is σ = 82765532. Its totient is φ = 82765530.

The previous prime is 82765499. The next prime is 82765549. The reversal of 82765531 is 13556728.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82765531 - 2⁵ = 82765499 is a prime.

It is a super-2 number, since 2×82765531² = 13700266243423922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82765591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41382765 + 41382766.

It is an arithmetic number, because the mean of its divisors is an integer number (41382766).

Almost surely, 2^82765531 is an apocalyptic number.

82765531 is a deficient number, since it is larger than the sum of its proper divisors (1).

82765531 is an equidigital number, since it uses as much as digits as its factorization.

82765531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 82765531 is about 9097.5563202434. The cubic root of 82765531 is about 435.7959286127.

The spelling of 82765531 in words is "eighty-two million, seven hundred sixty-five thousand, five hundred thirty-one".