42251330 has 32 divisors (see below), whose sum is σ = 83809728. Its totient is φ = 15208000.

The previous prime is 42251323. The next prime is 42251351. The reversal of 42251330 is 3315224.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9209 + ... + 13011.

It is an arithmetic number, because the mean of its divisors is an integer number (2619054).

Almost surely, 2^42251330 is an apocalyptic number.

42251330 is a deficient number, since it is larger than the sum of its proper divisors (41558398).

42251330 is a wasteful number, since it uses less digits than its factorization.

42251330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3922.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 42251330 is about 6500.1023068872. The cubic root of 42251330 is about 348.2946430068.

Adding to 42251330 its reverse (3315224), we get a palindrome (45566554).

It can be divided in two parts, 4225 and 1330, that added together give a palindrome (5555).

The spelling of 42251330 in words is "forty-two million, two hundred fifty-one thousand, three hundred thirty".