42217511 has 16 divisors (see below), whose sum is σ = 51451200. Its totient is φ = 33815040.

The previous prime is 42217507. The next prime is 42217519. The reversal of 42217511 is 11571224.

It is not a de Polignac number, because 42217511 - 2² = 42217507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42217519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16541 + ... + 18921.

It is an arithmetic number, because the mean of its divisors is an integer number (3215700).

Almost surely, 2^42217511 is an apocalyptic number.

42217511 is a deficient number, since it is larger than the sum of its proper divisors (9233689).

42217511 is a wasteful number, since it uses less digits than its factorization.

42217511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554.

The product of its digits is 560, while the sum is 23.

The square root of 42217511 is about 6497.5003655252. The cubic root of 42217511 is about 348.2016903458.

Adding to 42217511 its reverse (11571224), we get a palindrome (53788735).

The spelling of 42217511 in words is "forty-two million, two hundred seventeen thousand, five hundred eleven".