81022453 has 2 divisors, whose sum is σ = 81022454. Its totient is φ = 81022452.

The previous prime is 81022427. The next prime is 81022477. The reversal of 81022453 is 35422018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53333809 + 27688644 = 7303^2 + 5262^2 .

It is a cyclic number.

It is not a de Polignac number, because 81022453 - 2⁵ = 81022421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81022423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40511226 + 40511227.

It is an arithmetic number, because the mean of its divisors is an integer number (40511227).

Almost surely, 2^81022453 is an apocalyptic number.

It is an amenable number.

81022453 is a deficient number, since it is larger than the sum of its proper divisors (1).

81022453 is an equidigital number, since it uses as much as digits as its factorization.

81022453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 81022453 is about 9001.2473024576. The cubic root of 81022453 is about 432.7148462008.

The spelling of 81022453 in words is "eighty-one million, twenty-two thousand, four hundred fifty-three".