42503131 has 8 divisors (see below), whose sum is σ = 46577664. Its totient is φ = 38463720.

The previous prime is 42503129. The next prime is 42503141. The reversal of 42503131 is 13130524.

42503131 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 a cyclic number.

It is not a de Polignac number, because 42503131 - 2¹ = 42503129 is a prime.

It is a super-2 number, since 2×42503131² = 3613032289606322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42503099 and 42503108.

It is not an unprimeable number, because it can be changed into a prime (42503141) 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, 6211 + ... + 11116.

It is an arithmetic number, because the mean of its divisors is an integer number (5822208).

Almost surely, 2^42503131 is an apocalyptic number.

42503131 is a deficient number, since it is larger than the sum of its proper divisors (4074533).

42503131 is a wasteful number, since it uses less digits than its factorization.

42503131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17561.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 42503131 is about 6519.4425375181. The cubic root of 42503131 is about 348.9851719055.

Adding to 42503131 its reverse (13130524), we get a palindrome (55633655).

It can be divided in two parts, 4250 and 3131, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 42503131 in words is "forty-two million, five hundred three thousand, one hundred thirty-one".