31113101 has 4 divisors (see below), whose sum is σ = 31130400. Its totient is φ = 31095804.

The previous prime is 31113083. The next prime is 31113109. The reversal of 31113101 is 10131113.

It is a happy number.

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 31113101 - 2¹⁸ = 30850957 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 (31113109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5591 + ... + 9668.

It is an arithmetic number, because the mean of its divisors is an integer number (7782600).

Almost surely, 2^31113101 is an apocalyptic number.

It is an amenable number.

31113101 is a deficient number, since it is larger than the sum of its proper divisors (17299).

31113101 is a wasteful number, since it uses less digits than its factorization.

31113101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17298.

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 31113101 is about 5577.9118852847. The cubic root of 31113101 is about 314.5196373687.

Adding to 31113101 its reverse (10131113), we get a palindrome (41244214).

It can be divided in two parts, 31113 and 101, that multiplied together give a palindrome (3142413).

The spelling of 31113101 in words is "thirty-one million, one hundred thirteen thousand, one hundred one".