42218751 has 16 divisors (see below), whose sum is σ = 58433760. Its totient is φ = 27081600.

The previous prime is 42218749. The next prime is 42218767. The reversal of 42218751 is 15781224.

It is not a de Polignac number, because 42218751 - 2¹ = 42218749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42218711) 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, 31801 + ... + 33101.

It is an arithmetic number, because the mean of its divisors is an integer number (3652110).

Almost surely, 2^42218751 is an apocalyptic number.

42218751 is a deficient number, since it is larger than the sum of its proper divisors (16215009).

42218751 is a wasteful number, since it uses less digits than its factorization.

42218751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706.

The product of its digits is 4480, while the sum is 30.

The square root of 42218751 is about 6497.5957861351. The cubic root of 42218751 is about 348.2050994041.

Adding to 42218751 its reverse (15781224), we get a palindrome (57999975).

The spelling of 42218751 in words is "forty-two million, two hundred eighteen thousand, seven hundred fifty-one".