1850535221 has 8 divisors (see below), whose sum is σ = 1960628184. Its totient is φ = 1740579840.

The previous prime is 1850535139. The next prime is 1850535257. The reversal of 1850535221 is 1225350581.

It can be written as a sum of positive squares in 4 ways, for example, as 489736900 + 1360798321 = 22130^2 + 36889^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1850535221 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 (1850535721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6020 + ... + 61133.

It is an arithmetic number, because the mean of its divisors is an integer number (245078523).

Almost surely, 2^1850535221 is an apocalyptic number.

It is an amenable number.

1850535221 is a deficient number, since it is larger than the sum of its proper divisors (110092963).

1850535221 is a wasteful number, since it uses less digits than its factorization.

1850535221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68791.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 1850535221 is about 43017.8477030174. The cubic root of 1850535221 is about 1227.7193999754.

The spelling of 1850535221 in words is "one billion, eight hundred fifty million, five hundred thirty-five thousand, two hundred twenty-one".