42221403 has 48 divisors (see below), whose sum is σ = 73032960. Its totient is φ = 23001408.

The previous prime is 42221383. The next prime is 42221407. The reversal of 42221403 is 30412224.

42221403 is a `hidden beast` number, since 42 + 221 + 403 = 666.

It is not a de Polignac number, because 42221403 - 2⁶ = 42221339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42221407) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137376 + ... + 137682.

It is an arithmetic number, because the mean of its divisors is an integer number (1521520).

Almost surely, 2^42221403 is an apocalyptic number.

42221403 is a deficient number, since it is larger than the sum of its proper divisors (30811557).

42221403 is a wasteful number, since it uses less digits than its factorization.

42221403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 42221403 is about 6497.7998584136. The cubic root of 42221403 is about 348.2123901661.

Adding to 42221403 its reverse (30412224), we get a palindrome (72633627).

It can be divided in two parts, 42221 and 403, that added together give a palindrome (42624).

The spelling of 42221403 in words is "forty-two million, two hundred twenty-one thousand, four hundred three".