31313061 has 40 divisors (see below), whose sum is σ = 50982624. Its totient is φ = 19038240.

The previous prime is 31313047. The next prime is 31313071. The reversal of 31313061 is 16031313.

It is not a de Polignac number, because 31313061 - 2⁹ = 31312549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313041) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 137830 + ... + 138056.

Almost surely, 2^31313061 is an apocalyptic number.

It is an amenable number.

31313061 is a deficient number, since it is larger than the sum of its proper divisors (19669563).

31313061 is a wasteful number, since it uses less digits than its factorization.

31313061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 31313061 is about 5595.8074484385. The cubic root of 31313061 is about 315.1919918012.

Adding to 31313061 its reverse (16031313), we get a palindrome (47344374).

The spelling of 31313061 in words is "thirty-one million, three hundred thirteen thousand, sixty-one".