82145731 has 2 divisors, whose sum is σ = 82145732. Its totient is φ = 82145730.

The previous prime is 82145671. The next prime is 82145761. The reversal of 82145731 is 13754128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82145731 - 2¹⁵ = 82112963 is a prime.

It is a super-2 number, since 2×82145731² = 13495842243048722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 82145693 and 82145702.

It is not a weakly prime, because it can be changed into another prime (82145761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41072865 + 41072866.

It is an arithmetic number, because the mean of its divisors is an integer number (41072866).

Almost surely, 2^82145731 is an apocalyptic number.

82145731 is a deficient number, since it is larger than the sum of its proper divisors (1).

82145731 is an equidigital number, since it uses as much as digits as its factorization.

82145731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 31.

The square root of 82145731 is about 9063.4282145334. The cubic root of 82145731 is about 434.7053644045.

Adding to 82145731 its reverse (13754128), we get a palindrome (95899859).

The spelling of 82145731 in words is "eighty-two million, one hundred forty-five thousand, seven hundred thirty-one".