85153531 has 2 divisors, whose sum is σ = 85153532. Its totient is φ = 85153530.

The previous prime is 85153517. The next prime is 85153591. The reversal of 85153531 is 13535158.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85153531 - 2²³ = 76764923 is a prime.

It is a super-2 number, since 2×85153531² = 14502247683535922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85153493 and 85153502.

It is not a weakly prime, because it can be changed into another prime (85153501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42576765 + 42576766.

It is an arithmetic number, because the mean of its divisors is an integer number (42576766).

Almost surely, 2^85153531 is an apocalyptic number.

85153531 is a deficient number, since it is larger than the sum of its proper divisors (1).

85153531 is an equidigital number, since it uses as much as digits as its factorization.

85153531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 31.

The square root of 85153531 is about 9227.8670883363. The cubic root of 85153531 is about 439.9475333445.

Adding to 85153531 its reverse (13535158), we get a palindrome (98688689).

The spelling of 85153531 in words is "eighty-five million, one hundred fifty-three thousand, five hundred thirty-one".