42215553 has 8 divisors (see below), whose sum is σ = 62541600. Its totient is φ = 28143684.

The previous prime is 42215531. The next prime is 42215581. The reversal of 42215553 is 35551224.

It is a happy number.

It is not a de Polignac number, because 42215553 - 2⁸ = 42215297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1563539 = 42215553 / (4 + 2 + 2 + 1 + 5 + 5 + 5 + 3).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42215513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 781743 + ... + 781796.

It is an arithmetic number, because the mean of its divisors is an integer number (7817700).

Almost surely, 2^42215553 is an apocalyptic number.

It is an amenable number.

42215553 is a deficient number, since it is larger than the sum of its proper divisors (20326047).

42215553 is a wasteful number, since it uses less digits than its factorization.

42215553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563548 (or 1563542 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 42215553 is about 6497.3496904507. The cubic root of 42215553 is about 348.1963071969.

Adding to 42215553 its reverse (35551224), we get a palindrome (77766777).

The spelling of 42215553 in words is "forty-two million, two hundred fifteen thousand, five hundred fifty-three".