81562463 has 2 divisors, whose sum is σ = 81562464. Its totient is φ = 81562462.

The previous prime is 81562433. The next prime is 81562483. The reversal of 81562463 is 36426518.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81562463 - 2¹⁴ = 81546079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81562423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40781231 + 40781232.

It is an arithmetic number, because the mean of its divisors is an integer number (40781232).

Almost surely, 2^81562463 is an apocalyptic number.

81562463 is a deficient number, since it is larger than the sum of its proper divisors (1).

81562463 is an equidigital number, since it uses as much as digits as its factorization.

81562463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The square root of 81562463 is about 9031.1938856388. The cubic root of 81562463 is about 433.6740581889.

The spelling of 81562463 in words is "eighty-one million, five hundred sixty-two thousand, four hundred sixty-three".