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31121341 is a prime number
BaseRepresentation
bin111011010110…
…1111110111101
32011120010110021
41312231332331
530431340331
63031012141
7525345526
oct166557675
964503407
1031121341
1116626a19
12a50a051
1365a84c4
1441c184d
152aeb211
hex1dadfbd

31121341 has 2 divisors, whose sum is σ = 31121342. Its totient is φ = 31121340.

The previous prime is 31121309. The next prime is 31121357. The reversal of 31121341 is 14312113.

It is an a-pointer prime, because the next prime (31121357) can be obtained adding 31121341 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24542116 + 6579225 = 4954^2 + 2565^2 .

It is a cyclic number.

It is not a de Polignac number, because 31121341 - 25 = 31121309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31121371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560670 + 15560671.

It is an arithmetic number, because the mean of its divisors is an integer number (15560671).

Almost surely, 231121341 is an apocalyptic number.

It is an amenable number.

31121341 is a deficient number, since it is larger than the sum of its proper divisors (1).

31121341 is an equidigital number, since it uses as much as digits as its factorization.

31121341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 16.

The square root of 31121341 is about 5578.6504640459. The cubic root of 31121341 is about 314.5474007329.

Adding to 31121341 its reverse (14312113), we get a palindrome (45433454).

The spelling of 31121341 in words is "thirty-one million, one hundred twenty-one thousand, three hundred forty-one".