42206631 has 8 divisors (see below), whose sum is σ = 59585904. Its totient is φ = 26482560.

The previous prime is 42206627. The next prime is 42206639. The reversal of 42206631 is 13660224.

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

It is not a de Polignac number, because 42206631 - 2² = 42206627 is a prime.

It is a super-2 number, since 2×42206631² = 3562799400740322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42206639) 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, 413740 + ... + 413841.

It is an arithmetic number, because the mean of its divisors is an integer number (7448238).

Almost surely, 2^42206631 is an apocalyptic number.

42206631 is a deficient number, since it is larger than the sum of its proper divisors (17379273).

42206631 is a wasteful number, since it uses less digits than its factorization.

42206631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827601.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 42206631 is about 6496.6630665288. The cubic root of 42206631 is about 348.1717757457.

Adding to 42206631 its reverse (13660224), we get a palindrome (55866855).

The spelling of 42206631 in words is "forty-two million, two hundred six thousand, six hundred thirty-one".