42131101 has 4 divisors (see below), whose sum is σ = 43962912. Its totient is φ = 40299292.

The previous prime is 42131093. The next prime is 42131119. The reversal of 42131101 is 10113124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42131101 - 2³ = 42131093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42131161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 915871 + ... + 915916.

It is an arithmetic number, because the mean of its divisors is an integer number (10990728).

Almost surely, 2^42131101 is an apocalyptic number.

It is an amenable number.

42131101 is a deficient number, since it is larger than the sum of its proper divisors (1831811).

42131101 is a wasteful number, since it uses less digits than its factorization.

42131101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831810.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 42131101 is about 6490.8474793358. The cubic root of 42131101 is about 347.9639638776.

Adding to 42131101 its reverse (10113124), we get a palindrome (52244225).

The spelling of 42131101 in words is "forty-two million, one hundred thirty-one thousand, one hundred one".