31313101 has 4 divisors (see below), whose sum is σ = 31424032. Its totient is φ = 31202172.

The previous prime is 31313081. The next prime is 31313119. The reversal of 31313101 is 10131313.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10131313 = 19 ⋅533227.

It is a cyclic number.

It is not a de Polignac number, because 31313101 - 2⁷ = 31312973 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 (31313141) 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, 55041 + ... + 55606.

It is an arithmetic number, because the mean of its divisors is an integer number (7856008).

Almost surely, 2^31313101 is an apocalyptic number.

It is an amenable number.

31313101 is a deficient number, since it is larger than the sum of its proper divisors (110931).

31313101 is a wasteful number, since it uses less digits than its factorization.

31313101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110930.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 31313101 is about 5595.8110225418. The cubic root of 31313101 is about 315.1921260122.

Adding to 31313101 its reverse (10131313), we get a palindrome (41444414).

It can be divided in two parts, 31313 and 101, that multiplied together give a palindrome (3162613).

The spelling of 31313101 in words is "thirty-one million, three hundred thirteen thousand, one hundred one".