42550131 has 16 divisors (see below), whose sum is σ = 61425056. Its totient is φ = 26044416.

The previous prime is 42550129. The next prime is 42550141. The reversal of 42550131 is 13105524.

It is not a de Polignac number, because 42550131 - 2¹ = 42550129 is a prime.

It is a super-2 number, since 2×42550131² = 3621027296234322, 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 = 42550098 and 42550107.

It is not an unprimeable number, because it can be changed into a prime (42550121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4701 + ... + 10353.

It is an arithmetic number, because the mean of its divisors is an integer number (3839066).

Almost surely, 2^42550131 is an apocalyptic number.

42550131 is a deficient number, since it is larger than the sum of its proper divisors (18874925).

42550131 is a wasteful number, since it uses less digits than its factorization.

42550131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5862.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 42550131 is about 6523.0461442489. The cubic root of 42550131 is about 349.1137605570.

Adding to 42550131 its reverse (13105524), we get a palindrome (55655655).

The spelling of 42550131 in words is "forty-two million, five hundred fifty thousand, one hundred thirty-one".