42251613 has 16 divisors (see below), whose sum is σ = 59786496. Its totient is φ = 26449920.

The previous prime is 42251591. The next prime is 42251623. The reversal of 42251613 is 31615224.

42251613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42251613 - 2⁶ = 42251549 is a prime.

It is a super-2 number, since 2×42251613² = 3570397602203538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42251623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33708 + ... + 34938.

It is an arithmetic number, because the mean of its divisors is an integer number (3736656).

Almost surely, 2^42251613 is an apocalyptic number.

It is an amenable number.

42251613 is a deficient number, since it is larger than the sum of its proper divisors (17534883).

42251613 is a wasteful number, since it uses less digits than its factorization.

42251613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924.

The product of its digits is 1440, while the sum is 24.

The square root of 42251613 is about 6500.1240757389. The cubic root of 42251613 is about 348.2954206325.

Adding to 42251613 its reverse (31615224), we get a palindrome (73866837).

The spelling of 42251613 in words is "forty-two million, two hundred fifty-one thousand, six hundred thirteen".