85522131 has 18 divisors (see below), whose sum is σ = 127949900. Its totient is φ = 55043856.

The previous prime is 85522117. The next prime is 85522153. The reversal of 85522131 is 13122558.

It is a happy number.

85522131 is a `hidden beast` number, since 8 + 5 + 522 + 131 = 666.

It is not a de Polignac number, because 85522131 - 2⁶ = 85522067 is a prime.

It is a super-2 number, since 2×85522131² = 14628069781562322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85522095 and 85522104.

It is not an unprimeable number, because it can be changed into a prime (85522331) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1920 + ... + 13218.

Almost surely, 2^85522131 is an apocalyptic number.

85522131 is a deficient number, since it is larger than the sum of its proper divisors (42427769).

85522131 is a wasteful number, since it uses less digits than its factorization.

85522131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11363 (or 11331 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 85522131 is about 9247.8176344476. The cubic root of 85522131 is about 440.5814128606.

Adding to 85522131 its reverse (13122558), we get a palindrome (98644689).

The spelling of 85522131 in words is "eighty-five million, five hundred twenty-two thousand, one hundred thirty-one".