31230101 has 6 divisors (see below), whose sum is σ = 36328950. Its totient is φ = 26768616.

The previous prime is 31230079. The next prime is 31230163. The reversal of 31230101 is 10103213.

It can be written as a sum of positive squares in only one way, i.e., 22791076 + 8439025 = 4774^2 + 2905^2 .

It is not a de Polignac number, because 31230101 - 2¹⁸ = 30967957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230191) 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, 318626 + ... + 318723.

It is an arithmetic number, because the mean of its divisors is an integer number (6054825).

Almost surely, 2^31230101 is an apocalyptic number.

It is an amenable number.

31230101 is a deficient number, since it is larger than the sum of its proper divisors (5098849).

31230101 is an equidigital number, since it uses as much as digits as its factorization.

31230101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637363 (or 637356 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 31230101 is about 5588.3898396586. The cubic root of 31230101 is about 314.9133918274.

Adding to 31230101 its reverse (10103213), we get a palindrome (41333314).

The spelling of 31230101 in words is "thirty-one million, two hundred thirty thousand, one hundred one".