85142031 has 24 divisors (see below), whose sum is σ = 124987536. Its totient is φ = 51517440.

The previous prime is 85142023. The next prime is 85142053. The reversal of 85142031 is 13024158.

It is not a de Polignac number, because 85142031 - 2³ = 85142023 is a prime.

It is a super-2 number, since 2×85142031² = 14498330885609922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85141992 and 85142010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85142011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29551 + ... + 32303.

It is an arithmetic number, because the mean of its divisors is an integer number (5207814).

Almost surely, 2^85142031 is an apocalyptic number.

85142031 is a deficient number, since it is larger than the sum of its proper divisors (39845505).

85142031 is a wasteful number, since it uses less digits than its factorization.

85142031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843 (or 2830 counting only the distinct ones).

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

The square root of 85142031 is about 9227.2439547245. The cubic root of 85142031 is about 439.9277274545.

Adding to 85142031 its reverse (13024158), we get a palindrome (98166189).

The spelling of 85142031 in words is "eighty-five million, one hundred forty-two thousand, thirty-one".