31061061 has 6 divisors (see below), whose sum is σ = 44865990. Its totient is φ = 20707368.

The previous prime is 31061047. The next prime is 31061071. The reversal of 31061061 is 16016013.

It can be written as a sum of positive squares in only one way, i.e., 26936100 + 4124961 = 5190^2 + 2031^2 .

It is not a de Polignac number, because 31061061 - 2⁷ = 31060933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31061071) 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, 1725606 + ... + 1725623.

It is an arithmetic number, because the mean of its divisors is an integer number (7477665).

Almost surely, 2^31061061 is an apocalyptic number.

It is an amenable number.

31061061 is a deficient number, since it is larger than the sum of its proper divisors (13804929).

31061061 is a wasteful number, since it uses less digits than its factorization.

31061061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451235 (or 3451232 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 31061061 is about 5573.2451049635. The cubic root of 31061061 is about 314.3441835629.

Adding to 31061061 its reverse (16016013), we get a palindrome (47077074).

The spelling of 31061061 in words is "thirty-one million, sixty-one thousand, sixty-one".