85140253 has 4 divisors (see below), whose sum is σ = 92880288. Its totient is φ = 77400220.

The previous prime is 85140247. The next prime is 85140271. The reversal of 85140253 is 35204158.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85140253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85140203) 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, 3870001 + ... + 3870022.

It is an arithmetic number, because the mean of its divisors is an integer number (23220072).

Almost surely, 2^85140253 is an apocalyptic number.

It is an amenable number.

85140253 is a deficient number, since it is larger than the sum of its proper divisors (7740035).

85140253 is a wasteful number, since it uses less digits than its factorization.

85140253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7740034.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 85140253 is about 9227.1476090935. The cubic root of 85140253 is about 439.9246651325.

The spelling of 85140253 in words is "eighty-five million, one hundred forty thousand, two hundred fifty-three".