42215542 has 4 divisors (see below), whose sum is σ = 63323316. Its totient is φ = 21107770.

The previous prime is 42215531. The next prime is 42215581. The reversal of 42215542 is 24551224.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10553884 + ... + 10553887.

It is an arithmetic number, because the mean of its divisors is an integer number (15830829).

Almost surely, 2^42215542 is an apocalyptic number.

42215542 is a deficient number, since it is larger than the sum of its proper divisors (21107774).

42215542 is a wasteful number, since it uses less digits than its factorization.

42215542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21107773.

The product of its digits is 3200, while the sum is 25.

The square root of 42215542 is about 6497.3488439517. The cubic root of 42215542 is about 348.1962769540.

Adding to 42215542 its reverse (24551224), we get a palindrome (66766766).

The spelling of 42215542 in words is "forty-two million, two hundred fifteen thousand, five hundred forty-two".