31012141 has 2 divisors, whose sum is σ = 31012142. Its totient is φ = 31012140.

The previous prime is 31012133. The next prime is 31012169. The reversal of 31012141 is 14121013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20475625 + 10536516 = 4525^2 + 3246^2 .

It is a cyclic number.

It is not a de Polignac number, because 31012141 - 2³ = 31012133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31012841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506070 + 15506071.

It is an arithmetic number, because the mean of its divisors is an integer number (15506071).

Almost surely, 2^31012141 is an apocalyptic number.

It is an amenable number.

31012141 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012141 is an equidigital number, since it uses as much as digits as its factorization.

31012141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 31012141 is about 5568.8545500848. The cubic root of 31012141 is about 314.1790701042.

Adding to 31012141 its reverse (14121013), we get a palindrome (45133154).

The spelling of 31012141 in words is "thirty-one million, twelve thousand, one hundred forty-one".