42221532 has 12 divisors (see below), whose sum is σ = 98516936. Its totient is φ = 14073840.

The previous prime is 42221527. The next prime is 42221561. The reversal of 42221532 is 23512224.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 42221499 and 42221508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1759219 + ... + 1759242.

Almost surely, 2^42221532 is an apocalyptic number.

It is an amenable number.

42221532 is an abundant number, since it is smaller than the sum of its proper divisors (56295404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42221532 is a wasteful number, since it uses less digits than its factorization.

42221532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518468 (or 3518466 counting only the distinct ones).

The product of its digits is 960, while the sum is 21.

The square root of 42221532 is about 6497.8097848429. The cubic root of 42221532 is about 348.2127447994.

Adding to 42221532 its reverse (23512224), we get a palindrome (65733756).

The spelling of 42221532 in words is "forty-two million, two hundred twenty-one thousand, five hundred thirty-two".