42210381 has 8 divisors (see below), whose sum is σ = 59242720. Its totient is φ = 26659152.

The previous prime is 42210379. The next prime is 42210383. The reversal of 42210381 is 18301224.

It is an interprime number because it is at equal distance from previous prime (42210379) and next prime (42210383).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42210381 - 2¹ = 42210379 is a prime.

It is a super-2 number, since 2×42210381² = 3563432528330322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42210383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370210 + ... + 370323.

It is an arithmetic number, because the mean of its divisors is an integer number (7405340).

Almost surely, 2^42210381 is an apocalyptic number.

It is an amenable number.

42210381 is a deficient number, since it is larger than the sum of its proper divisors (17032339).

42210381 is a wasteful number, since it uses less digits than its factorization.

42210381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740555.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 42210381 is about 6496.9516698218. The cubic root of 42210381 is about 348.1820869651.

The spelling of 42210381 in words is "forty-two million, two hundred ten thousand, three hundred eighty-one".