42850221 has 4 divisors (see below), whose sum is σ = 57133632. Its totient is φ = 28566812.

The previous prime is 42850201. The next prime is 42850237. The reversal of 42850221 is 12205824.

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 not a de Polignac number, because 42850221 - 2²⁵ = 9295789 is a prime.

It is a super-2 number, since 2×42850221² = 3672282879497682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42850191 and 42850200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42850201) 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, 7141701 + ... + 7141706.

It is an arithmetic number, because the mean of its divisors is an integer number (14283408).

Almost surely, 2^42850221 is an apocalyptic number.

It is an amenable number.

42850221 is a deficient number, since it is larger than the sum of its proper divisors (14283411).

42850221 is a wasteful number, since it uses less digits than its factorization.

42850221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14283410.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 42850221 is about 6546.0080201601. The cubic root of 42850221 is about 349.9325611562.

It can be divided in two parts, 42850 and 221, that added together give a triangular number (43071 = T₂₉₃).

The spelling of 42850221 in words is "forty-two million, eight hundred fifty thousand, two hundred twenty-one".