85434131 has 4 divisors (see below), whose sum is σ = 85752000. Its totient is φ = 85116264.

The previous prime is 85434059. The next prime is 85434133. The reversal of 85434131 is 13143458.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13143458 = 2 ⋅6571729.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85434131 is a prime.

It is a super-2 number, since 2×85434131² = 14597981479450322, 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 = 85434094 and 85434103.

It is not an unprimeable number, because it can be changed into a prime (85434133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158531 + ... + 159068.

It is an arithmetic number, because the mean of its divisors is an integer number (21438000).

Almost surely, 2^85434131 is an apocalyptic number.

85434131 is a deficient number, since it is larger than the sum of its proper divisors (317869).

85434131 is a wasteful number, since it uses less digits than its factorization.

85434131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317868.

The product of its digits is 5760, while the sum is 29.

The square root of 85434131 is about 9243.0585305947. The cubic root of 85434131 is about 440.4302454780.

Adding to 85434131 its reverse (13143458), we get a palindrome (98577589).

The spelling of 85434131 in words is "eighty-five million, four hundred thirty-four thousand, one hundred thirty-one".