85851237 has 4 divisors (see below), whose sum is σ = 114468320. Its totient is φ = 57234156.

The previous prime is 85851191. The next prime is 85851247. The reversal of 85851237 is 73215858.

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 not a de Polignac number, because 85851237 - 2¹⁰ = 85850213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85851195 and 85851204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85851247) 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, 14308537 + ... + 14308542.

It is an arithmetic number, because the mean of its divisors is an integer number (28617080).

Almost surely, 2^85851237 is an apocalyptic number.

It is an amenable number.

85851237 is a deficient number, since it is larger than the sum of its proper divisors (28617083).

85851237 is a wasteful number, since it uses less digits than its factorization.

85851237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28617082.

The product of its digits is 67200, while the sum is 39.

The square root of 85851237 is about 9265.5942604886. The cubic root of 85851237 is about 441.1458374830.

The spelling of 85851237 in words is "eighty-five million, eight hundred fifty-one thousand, two hundred thirty-seven".