81122523 has 8 divisors (see below), whose sum is σ = 108272208. Its totient is φ = 54027264.

The previous prime is 81122513. The next prime is 81122539. The reversal of 81122523 is 32522118.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81122523 - 2⁴ = 81122507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81122493 and 81122502.

It is not an unprimeable number, because it can be changed into a prime (81122513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9990 + ... + 16187.

It is an arithmetic number, because the mean of its divisors is an integer number (13534026).

Almost surely, 2^81122523 is an apocalyptic number.

81122523 is a deficient number, since it is larger than the sum of its proper divisors (27149685).

81122523 is a wasteful number, since it uses less digits than its factorization.

81122523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27213.

The product of its digits is 960, while the sum is 24.

The square root of 81122523 is about 9006.8042612238. The cubic root of 81122523 is about 432.8929201300.

It can be divided in two parts, 8112 and 2523, that multiplied together give a square (20466576 = 4524²).

The spelling of 81122523 in words is "eighty-one million, one hundred twenty-two thousand, five hundred twenty-three".