85224437 has 4 divisors (see below), whose sum is σ = 85466220. Its totient is φ = 84982656.

The previous prime is 85224413. The next prime is 85224457. The reversal of 85224437 is 73442258.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26946481 + 58277956 = 5191^2 + 7634^2 .

It is a cyclic number.

It is not a de Polignac number, because 85224437 - 2¹² = 85220341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85224397 and 85224406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85224457) 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, 120362 + ... + 121067.

It is an arithmetic number, because the mean of its divisors is an integer number (21366555).

Almost surely, 2^85224437 is an apocalyptic number.

It is an amenable number.

85224437 is a deficient number, since it is larger than the sum of its proper divisors (241783).

85224437 is a wasteful number, since it uses less digits than its factorization.

85224437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241782.

The product of its digits is 53760, while the sum is 35.

The square root of 85224437 is about 9231.7082384573. The cubic root of 85224437 is about 440.0696119201.

The spelling of 85224437 in words is "eighty-five million, two hundred twenty-four thousand, four hundred thirty-seven".