81414553 has 4 divisors (see below), whose sum is σ = 88815888. Its totient is φ = 74013220.

The previous prime is 81414539. The next prime is 81414559. The reversal of 81414553 is 35541418.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 81414553 - 2⁵ = 81414521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81414559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3700651 + ... + 3700672.

It is an arithmetic number, because the mean of its divisors is an integer number (22203972).

Almost surely, 2^81414553 is an apocalyptic number.

It is an amenable number.

81414553 is a deficient number, since it is larger than the sum of its proper divisors (7401335).

81414553 is a wasteful number, since it uses less digits than its factorization.

81414553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7401334.

The product of its digits is 9600, while the sum is 31.

The square root of 81414553 is about 9023.0013299345. The cubic root of 81414553 is about 433.4117498456.

The spelling of 81414553 in words is "eighty-one million, four hundred fourteen thousand, five hundred fifty-three".