42503631 has 8 divisors (see below), whose sum is σ = 57047424. Its totient is φ = 28147800.

The previous prime is 42503611. The next prime is 42503633. The reversal of 42503631 is 13630524.

It is a happy number.

42503631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42503631 - 2⁵ = 42503599 is a prime.

It is a super-2 number, since 2×42503631² = 3613117296368322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42503633) 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 7 ways as a sum of consecutive naturals, for example, 46461 + ... + 47366.

It is an arithmetic number, because the mean of its divisors is an integer number (7130928).

Almost surely, 2^42503631 is an apocalyptic number.

42503631 is a deficient number, since it is larger than the sum of its proper divisors (14543793).

42503631 is a wasteful number, since it uses less digits than its factorization.

42503631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93981.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 42503631 is about 6519.4808842422. The cubic root of 42503631 is about 348.9865403687.

It can be divided in two parts, 42503 and 631, that added together give a palindrome (43134).

The spelling of 42503631 in words is "forty-two million, five hundred three thousand, six hundred thirty-one".