31061 has 4 divisors (see below), whose sum is σ = 31500. Its totient is φ = 30624.

The previous prime is 31051. The next prime is 31063. The reversal of 31061 is 16013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16013 = 67 ⋅239.

It can be written as a sum of positive squares in 2 ways, for example, as 14161 + 16900 = 119^2 + 130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31061.

It is not an unprimeable number, because it can be changed into a prime (31063) 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, 86 + ... + 263.

It is an arithmetic number, because the mean of its divisors is an integer number (7875).

2³¹⁰⁶¹ is an apocalyptic number.

It is an amenable number.

31061 is a deficient number, since it is larger than the sum of its proper divisors (439).

31061 is an equidigital number, since it uses as much as digits as its factorization.

31061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438.

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

The square root of 31061 is about 176.2413118426. The cubic root of 31061 is about 31.4343977785.

Adding to 31061 its reverse (16013), we get a palindrome (47074).

The spelling of 31061 in words is "thirty-one thousand, sixty-one".