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31053409 is a prime number
BaseRepresentation
bin111011001110…
…1011001100001
32011102200021021
41312131121201
530422202114
63025325441
7524643502
oct166353141
964380237
1031053409
111658a982
12a496881
1365835ca
1441a4ba9
152ad6024
hex1d9d661

31053409 has 2 divisors, whose sum is σ = 31053410. Its totient is φ = 31053408.

The previous prime is 31053383. The next prime is 31053431. The reversal of 31053409 is 90435013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23736384 + 7317025 = 4872^2 + 2705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-31053409 is a prime.

It is not a weakly prime, because it can be changed into another prime (31053479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15526704 + 15526705.

It is an arithmetic number, because the mean of its divisors is an integer number (15526705).

Almost surely, 231053409 is an apocalyptic number.

It is an amenable number.

31053409 is a deficient number, since it is larger than the sum of its proper divisors (1).

31053409 is an equidigital number, since it uses as much as digits as its factorization.

31053409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 31053409 is about 5572.5585685572. The cubic root of 31053409 is about 314.3183681833.

The spelling of 31053409 in words is "thirty-one million, fifty-three thousand, four hundred nine".