28522131 has 8 divisors (see below), whose sum is σ = 41486784. Its totient is φ = 17286120.

The previous prime is 28522111. The next prime is 28522157. The reversal of 28522131 is 13122582.

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

It is not a de Polignac number, because 28522131 - 2⁵ = 28522099 is a prime.

It is a super-2 number, since 2×28522131² = 1627023913562322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28522111) 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, 432121 + ... + 432186.

It is an arithmetic number, because the mean of its divisors is an integer number (5185848).

Almost surely, 2^28522131 is an apocalyptic number.

28522131 is a deficient number, since it is larger than the sum of its proper divisors (12964653).

28522131 is a wasteful number, since it uses less digits than its factorization.

28522131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864321.

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

The square root of 28522131 is about 5340.6114818436. The cubic root of 28522131 is about 305.5347815641.

The spelling of 28522131 in words is "twenty-eight million, five hundred twenty-two thousand, one hundred thirty-one".