42101231 has 6 divisors (see below), whose sum is σ = 44723760. Its totient is φ = 39624416.

The previous prime is 42101209. The next prime is 42101249. The reversal of 42101231 is 13210124.

It is not a de Polignac number, because 42101231 - 2⁶ = 42101167 is a prime.

It is a super-2 number, since 2×42101231² = 3545027303430722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42101261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72551 + ... + 73128.

It is an arithmetic number, because the mean of its divisors is an integer number (7453960).

Almost surely, 2^42101231 is an apocalyptic number.

42101231 is a deficient number, since it is larger than the sum of its proper divisors (2622529).

42101231 is a wasteful number, since it uses less digits than its factorization.

42101231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145713 (or 145696 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 42101231 is about 6488.5461391594. The cubic root of 42101231 is about 347.8817115698.

Adding to 42101231 its reverse (13210124), we get a palindrome (55311355).

It can be divided in two parts, 4210123 and 1, that added together give a palindrome (4210124).

The spelling of 42101231 in words is "forty-two million, one hundred one thousand, two hundred thirty-one".