85131133 has 2 divisors, whose sum is σ = 85131134. Its totient is φ = 85131132.

The previous prime is 85131103. The next prime is 85131139. The reversal of 85131133 is 33113158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85045284 + 85849 = 9222^2 + 293^2 .

It is a cyclic number.

It is not a de Polignac number, because 85131133 - 2¹³ = 85122941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85131098 and 85131107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85131139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42565566 + 42565567.

It is an arithmetic number, because the mean of its divisors is an integer number (42565567).

Almost surely, 2^85131133 is an apocalyptic number.

It is an amenable number.

85131133 is a deficient number, since it is larger than the sum of its proper divisors (1).

85131133 is an equidigital number, since it uses as much as digits as its factorization.

85131133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 25.

The square root of 85131133 is about 9226.6534019654. The cubic root of 85131133 is about 439.9089567139.

It can be divided in two parts, 85131 and 133, that added together give a square (85264 = 292²).

The spelling of 85131133 in words is "eighty-five million, one hundred thirty-one thousand, one hundred thirty-three".