81354101 has 2 divisors, whose sum is σ = 81354102. Its totient is φ = 81354100.

The previous prime is 81354089. The next prime is 81354113. The reversal of 81354101 is 10145318.

It is a balanced prime because it is at equal distance from previous prime (81354089) and next prime (81354113).

It can be written as a sum of positive squares in only one way, i.e., 80982001 + 372100 = 8999^2 + 610^2 .

It is a cyclic number.

It is not a de Polignac number, because 81354101 - 2¹⁸ = 81091957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81354901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40677050 + 40677051.

It is an arithmetic number, because the mean of its divisors is an integer number (40677051).

Almost surely, 2^81354101 is an apocalyptic number.

It is an amenable number.

81354101 is a deficient number, since it is larger than the sum of its proper divisors (1).

81354101 is an equidigital number, since it uses as much as digits as its factorization.

81354101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 81354101 is about 9019.6508247271. The cubic root of 81354101 is about 433.3044508692.

Adding to 81354101 its reverse (10145318), we get a palindrome (91499419).

The spelling of 81354101 in words is "eighty-one million, three hundred fifty-four thousand, one hundred one".