42245515 has 16 divisors (see below), whose sum is σ = 54780768. Its totient is φ = 31090176.

The previous prime is 42245507. The next prime is 42245519. The reversal of 42245515 is 51554224.

It is not a de Polignac number, because 42245515 - 2³ = 42245507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42245519) 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, 21619 + ... + 23491.

It is an arithmetic number, because the mean of its divisors is an integer number (3423798).

Almost surely, 2^42245515 is an apocalyptic number.

42245515 is a deficient number, since it is larger than the sum of its proper divisors (12535253).

42245515 is a wasteful number, since it uses less digits than its factorization.

42245515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238.

The product of its digits is 8000, while the sum is 28.

The square root of 42245515 is about 6499.6549908437. The cubic root of 42245515 is about 348.2786638154.

Adding to 42245515 its reverse (51554224), we get a palindrome (93799739).

The spelling of 42245515 in words is "forty-two million, two hundred forty-five thousand, five hundred fifteen".